Latest Articles from PhytoKeys Latest 100 Articles from PhytoKeys https://phytokeys.pensoft.net/ Fri, 29 Mar 2024 03:37:33 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ Gentiana mopanshanensis (Gentianaceae), a new species from Yunnan, southwest China https://phytokeys.pensoft.net/article/119800/ PhytoKeys 239: 215-228

DOI: 10.3897/phytokeys.239.119800

Authors: Tao Chen, Ting-Ting Wang, Shao-Yun Liu, Huan-Chong Wang

Abstract: Gentiana mopanshanensis, a new species of the family Gentianaceae is here described and illustrated. This species is presently known only from the Mopanshan Mountain, Yunnan Province, southwest China. Phylogenetic analysis based on ITS sequence data has shown that this new species is a member of the series Fimbriatae of the section Chondrophyllae. Morphologically, it mostly resembles G. mairei and G. panthaica, but differs clearly from the latter two species in the shape and size of the leaves, and the characters of the corolla throat and plicae.

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Research Article Wed, 20 Mar 2024 16:15:55 +0200
Chimonobambusa farcta (Poaceae, Bambusoideae), a new species from western Guangxi, China with taxonomic notes on C. pubescens and C. luzhiensis https://phytokeys.pensoft.net/article/116592/ PhytoKeys 239: 13-27

DOI: 10.3897/phytokeys.239.116592

Authors: Guang-Hui Lai, Jin-Jun Yue

Abstract: Chimonobambusa farcta, a new species of temperate woody bamboos from western Guangxi, China is described and illustrated. The new species is similar to C. pubescens in the solid internodes of culms, but differs in having taller culm to 7 m with longer verrucose internodes to 23.5 cm and intranodes to 4 mm, intranode usually with a ring of 7–9 root thorns below mid-culm, abaxially brown or brown-purple verrucose-setose culm leaf sheaths with indistinct transverse veins, conspicuously developed culm leaf blades to 3.2 cm long, longer foliage leaf sheaths to 5.2 cm, larger and broader foliage leaf blades to 22 × 1.4 cm. It also somewhat resembles C. convoluta, but can be easily distinguished by having solid internodes and longer intranode 2–4 mm, very prominent nodes with supranodal ridge obviously more elevated than sheath scar, usually persistent and sometimes brownish striate culm leaf sheaths, longer culm leaf blades to 3.2 cm, and abaxially glabrous foliage leaf sheaths. Based on the morphological characteristics, this new species is assigned to C. sect. Chimonobambusa. The character description of C. pubescens are revised for its culm to 2.1 m tall, 1.1 cm in diameter and glabrous foliage leaf blades. The systematic position of C. luzhiensis is discussed, and this species is proposed as a member of C. sect. Chimonobambusa.

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Research Article Tue, 5 Mar 2024 13:54:59 +0200
Using scanning electron microscopy and molecular data to discover a new species from old herbarium collections: The case of Phlomoides henryi (Lamiaceae, Lamioideae) https://phytokeys.pensoft.net/article/117180/ PhytoKeys 238: 127-146

DOI: 10.3897/phytokeys.238.117180

Authors: Yue Zhao, Fei Zhao, Alan J. Paton, Jin-Fei Xiao, Ya-Ping Chen, Chun-Lei Xiang

Abstract: Phlomoides is one of the largest genera of Lamiaceae with approximately 150–170 species distributed mainly in Eurasia. In this study, we describe and illustrate a new species, P. henryi, which was previously misidentified as P. bracteosa, from Yunnan Province, southwest China. Molecular phylogenetic analyses revealed that P. henryi is found within a clade in which most species lack basal leaves. In this clade, the new species is morphologically distinct from P. rotata in having an obvious stem and, from the rest, by having transparent to white trichomes inside the upper corolla lip. In addition, micro-features of trichomes on the calyx and leaf epidermis can differentiate the new species from other species grouped in the same clade and a key, based on trichome morphology for these species, is provided. The findings demonstrate that the use of scanning electron microscopy can reveal inconspicuous morphological affinities amongst morphologically similar species and play an important role in the taxonomic study of the genus Phlomoides.

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Research Article Tue, 20 Feb 2024 10:30:35 +0200
Piper motuoense, a new species of Piperaceae from Xizang, China https://phytokeys.pensoft.net/article/115494/ PhytoKeys 238: 85-94

DOI: 10.3897/phytokeys.238.115494

Authors: Fan Su, Xiao-Wei Qin, Rui Fan, Lin Yan, Xun-Zhi Ji, Chao-Yun Hao

Abstract: Piper motuoense X.W.Qin, F.Su & C.Y.Hao, a new species of Piperaceae from Xizang, China, is described and illustrated in this paper. The new species resembles P. yinkiangense and P. anisotis, but it can be readily distinguished from the compared species by several characteristics. Gonophyll leaves are chartaceous and the leaf secondary vein count is 7–9, with the outermost pair being very weak when there are nine veins. Additionally, the apical pair arises 2–4 cm above the base and the leaf base is asymmetrical, with bilateral petioles that cling and heal together. Pistillate floral bracts are sessile, with 3, 4 or 5 stigmas. The description of the new species includes photographs, detailed descriptions, notes on etymology, distribution and habitat, as well as comparisons with morphologically similar species.

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Research Article Wed, 7 Feb 2024 10:40:41 +0200
Hydrangea xinfeniae (Hydrangeaceae), a new species from Sichuan, China https://phytokeys.pensoft.net/article/114289/ PhytoKeys 238: 65-73

DOI: 10.3897/phytokeys.238.114289

Authors: Jian Ru, Wen-Bin Ju, Heng-Ning Deng, Bo Xu, Xiang Zhou, Chuan-Jiong Liu, Wei Huang

Abstract: Hydrangea xinfeniae W.B.Ju & J.Ru, a new species of Hydrangeaceae from Sichuan Province, China, is described and illustrated. The new species belongs to Hydrangea sect. Dichroa (Lour.) Y.De Smet & Samain, with its distinctive characteristic being the nearly superior ovary. It shares morphological similarities with H. yaoshanensis (Y.C.Wu) Y.De Smet & C.Granados, but can be distinguished by its hirsute trichomes densely covered on the branchlets, leaves, peduncles and pedicels, broadly elliptic to rectangular-elliptic leaf blade with nearly rounded base, coarse teeth leaf margins, 3–4 pairs of lateral veins, corymbose cyme with few and loose branches, lanceolate bract, the calyx tube and lobes margin with sparsely hirsute trichomes, adaxially glabrous and abaxially sparsely hirsute petal, outer whorl filaments are linear, inner ones are awl-shaped, glabrous styles, and the nearly superior ovary. H. xinfeniae sp. nov. currently known from only three relatively small populations of the type locality, and its conservation status is assessed as Data Deficient (DD).

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Research Article Fri, 2 Feb 2024 11:46:17 +0200
Molecular and morphological evidence support a new species of Rosaceae Prunus subg. Cerasus from Wuyishan National Park, southeast China https://phytokeys.pensoft.net/article/115098/ PhytoKeys 237: 269-279

DOI: 10.3897/phytokeys.237.115098

Authors: Xiangui Yi, Jingjing Dong, Jie Chen, Huajin Zhou, Tong Wu, Shucheng Gao, Xiangzhen Chen, Meng LI, Xianrong Wang

Abstract: Prunus tongmuensis, a new species of cherry blossom, is described and illustrated from Wuyishan National Park, southeast China. This species is characterized by its tubular to nearly bottle-shaped receptacles and dark purple drupes. It can be distinguished from other wild cherry trees by its flowers and leaves, reddish brown young leaves, presence of 1–2 glands at the base of leaves, petioles densely covered with yellowish brown villi, longer pedicels (0.6–2.5 cm), villous pistil, and dark purple drupes. In the present study, we conducted a comprehensive morphological study based on specimens of the new species and its morphologically close species, field observations, and examination of pollen morphology. In addition, our phylogenetic analysis based on the complete plastid genome sequences further confirms the status of the new species and indicates that it is closely related to Prunus clarofolia, however, it notably differs in leaf shape, size, petiole villus color, gland location, timing of flower and leaf openings, and reflexed or spread sepals, as well as drupe color.

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Research Article Wed, 31 Jan 2024 17:04:42 +0200
The identity of Bupleurum jeholense (Apiaceae) https://phytokeys.pensoft.net/article/111977/ PhytoKeys 237: 231-243

DOI: 10.3897/phytokeys.237.111977

Authors: Li-Hua Wang, Xue-Min Xu, Yi He, Quan-Ru Liu

Abstract: Bupleurum jeholense Nakai (Apioideae, Apiaceae), originally found in the Wuling Mountain of China, was initially described as a species but later treated as a variety of B. sibiricum Vest ex Spreng. However, researchers have recently found that it is more closely related to B. chinense DC. In this study, we conducted morphological and phylogenetic analyses as well as chromosome counting to determine the taxonomic status of B. sibiricum var. jeholense (Nakai) Chu. Our results showed that B. sibiricum var. jeholense and B. chinense share common features (i.e., bracteoles 5 and stem solid) that distinguish both from B. sibiricum var. sibiricum. The chromosome number of B. sibiricum var. jeholense was found to be the same as in B. chinense (i.e., 2n = 12), whereas the chromosome number of B. sibiricum var. sibiricum was 64. A phylogenetic tree based on complete chloroplast genome data revealed a close relationship between B. sibiricum var. jeholense and B. chinense. Finally, B. sibiricum var. jeholense and B. chinense were mainly found to differ in plant height, number of stems, and middle stem leaves. Based on this evidence, we propose a new combination: Bupleurum chinense var. jeholense (Nakai) Q.R.Liu & L.H.Wang.

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Research Article Wed, 31 Jan 2024 16:49:46 +0200
Phylogenomics reveal Populus gonggaensis as a hybrid between P. lasiocarpa and P. cathayana (Salicaceae) https://phytokeys.pensoft.net/article/103012/ PhytoKeys 237: 161-177

DOI: 10.3897/phytokeys.237.103012

Authors: Wenyan Du, Yachao Wang, Dajun Xie, Enze Li, Yuran Bai, Ce Shang, Zhixiang Zhang

Abstract: High levels of intra-specific polymorphism and frequent hybridisation make it difficult to define species and correctly apply their scientific names. Populus L. is a challenging genus with plentiful natural and artificial hybrids. This study is a part of the project ‘Flora of Pan-Himalaya’ and aims to determine the taxonomic identity of P. gonggaensis N. Chao & J.R. He and to find out whether it is of hybrid origin. Whole-genome sequencing data were obtained from 57 samples. The SNP matrix was developed for phylogenetic reconstruction, ABBA-BABA statistics, PCA and ADMIXTURE analysis. The results indicate that P. gonggaensis is a spontaneous hybrid between P. lasiocarpa and P. cathayana. This study points out the importance of SNP data and comprehensive analyses for discovering the potential interspecific hybridisation and clarifies the usage of the name. In addition, the lectotype of P. gonggaensis was designated.

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Research Article Tue, 23 Jan 2024 14:43:06 +0200
Hedysarum qilianshanense sp. nov. (Fabaceae, Hedysareae), a new species from the Qilianshan Mountains in Gansu, China https://phytokeys.pensoft.net/article/116236/ PhytoKeys 237: 103-116

DOI: 10.3897/phytokeys.237.116236

Authors: Pei-Liang Liu, Qian-Xi Guo, Jian-Qi Zhang, Lu-Lu Xun, Yuan Lu, Ming Yue

Abstract: Hedysarum qilianshanense sp. nov. (Fabaceae, Hedysareae) is described and illustrated from the Qilianshan Mountains in Gansu, China. This new species is similar to H. przewalskii, but can be distinguished by its corolla being light purple to purple, standard 15–19 mm long, wings 14–16 mm long, keels 16–19 mm long, and the ovary and legume being glabrous. The new species can be easily distinguished from H. neglectum Ledeb. by its bract being shorter than the pedicel, and the ovary and legume being glabrous. Phylogenetic tree based on the nuclear ITS and ETS sequences shows that H. qilianshanense is sister to H. przewalskii, while the tree based on the plastid psbA-trnH, trnC-petN, trnL-F, trnS-G and petN-psbM sequences shows H. qilianshanense as sister to a clade consisting of H. hedysaroides, H. inundatum, H. americanum and H. neglectum. The new species is a diploid with the chromosome number 2n = 14. Based on morphological, phylogenetic and karyotypic evidence, the new species may originate from an ancient homoploid hybrid speciation event.

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Research Article Mon, 22 Jan 2024 16:22:21 +0200
Aletris guangxiensis (Nartheciaceae), a new species from Guangxi, China https://phytokeys.pensoft.net/article/115037/ PhytoKeys 237: 79-89

DOI: 10.3897/phytokeys.237.115037

Authors: You Nong, Ke-Dao Lai, Yun-Rui Qin, Gui-Yuan Wei, Ke-Jian Yan, Chuan-Gui Xu, Zi-Yi Zhao, Ren-Chuan Hu, Yun-Feng Huang

Abstract: Aletris guangxiensis Y. Nong & Y. F. Huang (Nartheciaceae), a new species from Guangxi, China, is described and illustrated. This new species is most similar to A. scopulorum, but it can be easily distinguished by its sparsely glandular, 5–18 cm long scape, glandular inflorescence axis, distinctly pedicellate flowers, sparsely glandular, 5–10 mm long pedicel, bract borne at base of pedicel, glabrous perianth divided to the base, strongly recurved or revolute perianth lobes and turbinate, obovoid to oblong-obovoid capsule. An identification key for 24 species and 1 hybrid of Aletris is also provided.

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Research Article Fri, 19 Jan 2024 14:13:28 +0200
Hypericum liboense (Hypericaceae), a new species from Guizhou, China https://phytokeys.pensoft.net/article/110482/ PhytoKeys 237: 37-49

DOI: 10.3897/phytokeys.237.110482

Authors: Tian-Rou Wu, Jian Xu, Ming-Tai An, Jiang-Hong Yu, Feng Liu, Zheng-Ren Chen

Abstract: Hypericum liboense M.T.An & T.R.Wu, sp. nov. (Hypericaceae) is a newly described species found in the Maolan National Nature Reserve of Guizhou Province, where it grows in rocky habitats without soil on karst mountain tops. In this study, key morphological characters were compared between the new species and the other known Hypericum species of Hypericaceae. DNA sequences were extracted from the leaves of the new species, with nuclear gene sequences (ITS) generated to reconstruct phylogenetic trees and describe its phylogenetic position in relation to other species of Hypericum. Our results show that the proposed new species has the typical characteristics of the genus Hypericum in morphology being similar to Hypericum monogynum, but differing in its sessile and semi-clasped leaves, long elliptical to long circular leaf blades, thickly papery to thinly leathery, with entire and wavy leaf margins. The abaxial side of the leaves is covered with white powder, giving them a grey-white appearance. The main lateral veins of the leaves are 8–15-paired, and the midvein on both sides is convex. The main lateral veins and midvein branch are conspicuous, with tertiary venation forming a network on the leaf surface and appearing prominently sunken. The inflorescences are 1–3-flowered, with a large calyx and conspicuous veins. The molecular phylogenetic analysis (PP = 1.00) provided substantial evidence for the proposition of H. liboense as a new species within Hypericum. Morphological and molecular evidence is presented, corroborating the proposition of the new species, including a comprehensive account of the distinctive morphological attributes of H. liboense, along with its key distinguishing features from similar species.

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Research Article Fri, 12 Jan 2024 19:06:26 +0200
A new species of genus Crenotia (Bacillariophyta) from Tibet, China https://phytokeys.pensoft.net/article/112939/ PhytoKeys 237: 23-35

DOI: 10.3897/phytokeys.237.112939

Authors: Xinyuan Na, Jiaming Liu, Ying Zhang, John Patrick Kociolek, Maxim Kulikovskiy, Xinxin Lu, Fengyang Sui, Huan Zhu, Guoxiang Liu, Yawen Fan, Yan Liu

Abstract: During the investigation of the freshwater diatoms from Tibet, a monoraphid species was observed from a hot spring near Anduo County, located on a plateau in the central portion of Tibet. This species shares the diagnostic features of Crenotia, such as the valve bent along the transapical axis, striae uniseriate to biseriate from centre to the apices and areolae with special structures located at the end of each stria. We compared the morphological characters of this new species with the others in this genus and show it to be new; it is named Crenotia tibetia sp. nov. This species has small valves with slightly protracted ends with nearly capitate apices, lanceolate axial area, central area unilaterally expanded to the margin, striae uniseriate to biseriate, but, in some valves, the striae are only uniseriate. Areolae are round small to irregular in shape and, at the end of each stria, there is a horseshoe-shaped areola present. Observations of developing valves show all the striae begin biseriate, then they become covered by silica to form uniseriate striae. Comparisons are made amongst the species in this genus and with genera assigned to the Achnanthidiaceae.

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Research Article Thu, 11 Jan 2024 18:59:30 +0200
Vaccinium usneoides (Ericaceae), a new species from Yunnan, China https://phytokeys.pensoft.net/article/112658/ PhytoKeys 236: 187-195

DOI: 10.3897/phytokeys.236.112658

Authors: Yong-Jie Guo, Ting Zhang, Ji-Dong Ya, Wei Zhang, Xiu-Ying Shen, Zhou-Dong Han, Jing-Bo Ni, Jian-Yong Su, Yi-Hua Tong

Abstract: Vaccinium usneoides (Ericaceae), a new species from Fugong County of Yunnan Province, China is described and illustrated. This new species belongs to Vaccinium sect. Calcicolus and is most similar to V. brachyandrum, but differs in its branches hanging down, much smaller leaf blades, shorter inflorescences and pedicels, non-glandular tomentellate or densely pubescent inflorescence rachis and pedicels, densely white-pubescent hypanthium and pilose filaments.

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Research Article Thu, 21 Dec 2023 19:49:55 +0200
Primula lizipingensis (Primulaceae), a new species from Sichuan, China https://phytokeys.pensoft.net/article/112169/ PhytoKeys 236: 135-143

DOI: 10.3897/phytokeys.236.112169

Authors: Wen-Bin Ju, Liu-Yang He, Qi Lan, Ying-Hao Wu, Heng-Ning Deng, Xing-Jin He, Xin-Fen Gao, Bo Xu

Abstract: A new species, Primula lizipingensis W.B.Ju, L.Y.He & X.F.Gao, found in Shimian County, Sichuan, China, is described and illustrated. It is morphologically similar to P. rhodochroa and P. socialis, but can be distinguished from them in having shorter plants covering with white farinose, leaf margin sharply dentate above the middle, the leaf blade becomes papery after drying, scapes obsolete, the bract linear-lanceolate to subulate, solitary at the base of the pedicel, and the white hairs present inside the corolla tube.

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Research Article Thu, 14 Dec 2023 10:09:38 +0200
Vaccinium chaozhouense (Ericaceae), a new species from East Guangdong, China https://phytokeys.pensoft.net/article/108732/ PhytoKeys 236: 113-119

DOI: 10.3897/phytokeys.236.108732

Authors: Yi-Hua Tong, Pei-Zhao Ye, Jian-Hong Ding, Wei-Chao Huang, Wei Huang, Jing-Bo Ni

Abstract: Vaccinium chaozhouense (Ericaceae), a new species from East Guangdong Province, China is described and illustrated. This new species is morphologically similar to V. wrightii by having flowers with persistent and leaf-like bracts, long pedicels, and white spherical-urceolate corollas, but is distinguished by having glandular trichomes on the abaxial surface of the leaf blade, shorter pedicels, sparsely pilose corolla ridges, and anther thecae longer than the tubules. A key to the new species and morphologically similar species is also provided.

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Research Article Fri, 8 Dec 2023 14:44:30 +0200
An integrative approach to species delimitation sinks three Chinese limestone karst Elatostema (Urticaceae) species https://phytokeys.pensoft.net/article/114837/ PhytoKeys 236: 83-96

DOI: 10.3897/phytokeys.236.114837

Authors: Zi-Bing Xin, Alexandre K. Monro, Ren-Fen Wang, Long-Fei Fu

Abstract: Elatostema is recognized as a taxonomically difficult group due to the reduced nature of the tiny flowers and inflorescences, also the large number of species (ca 650 to 700). Different opinions on morphological species delimitation have resulted in instability, which is problematic in such a speciose group. In this paper, the taxonomic status of three putative species, E. robustipes, E. scaposum, E. conduplicatum and their hypothetical closest relatives, was revised using morphological and molecular observations. Morphological comparison suggested high similarity between E. robustipes & E. retrohirtum, E. scaposum & E. oblongifolium, E. conduplicatum & E. coriaceifolium, respectively. Phylogenetic analyses of four universal DNA barcodes (ITS, trnH-psbA, matK and rbcL) suggested that each species pair represents a single evolutionary lineage. Taking these two findings together, we propose E. robustipes to be a synonym of E. retrohirtum, E. scaposum a synonym of E. oblongifolium, and E. conduplicatum a synonym of E. coriaceifolium. Our results recover the number, shape and size of the bracts and bracteoles to be relatively stable characters, and the disposition of the male inflorescences on modified stems to be an unstable character, unsuitable for species delimitation in Elatostema.

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Research Article Wed, 6 Dec 2023 11:26:23 +0200
A new species of Cotoneaster (Rosaceae) from western Sichuan, China https://phytokeys.pensoft.net/article/111819/ PhytoKeys 236: 39-52

DOI: 10.3897/phytokeys.236.111819

Authors: Mingwan Li, Dan Li, Mengfei Lu, Shuangfeng Mo, Shen Ding, Yuanyuan Chen, Yong Lai, Dangquan Zhang, Wenbo Liao, Qiang Fan

Abstract: Cotoneaster densiflorus, a new species of Rosaceae from western Sichuan, China, is described and illustrated. Morphologically, we inferred that the new species belongs to Cotoneaster Ser. Salicifolii sensu Yü et al. (1974) in the Flora of China and Fryer and Hylmö (2009). This species is most similar to C. salicifolius, but differs in its leaf blade of ovate-lanceolate to obovate shape (vs. elliptic-oblong to ovate-lanceolate), smaller length-width ratio of 2.37 ± 0.31 (vs. 3.17 ± 0.32), slightly conduplicate (vs. not conduplicate), less lateral veins of 6–8 pairs (vs. 12–16 pairs), upper surface slightly rugose (vs. rugose), leaf margin plane (vs. revolute), lower surface densely grey tomentose (vs. grey tomentose, with bloom), greater corolla diameter of 7–9 mm (vs. 5–6 mm), styles 2 (vs. 2–3), pyrenes 2 (vs. 2–3), larger pollen grains P/E values of 2.05 ± 0.12 (vs. 1.19 ± 0.05) and leaf epidermis type W (vs. type I). Based on phylogenetic analysis of the whole chloroplast genome, C. densiflorus is sister to C. rhytidophyllus, but distantly related to C. salicifolius.

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Research Article Mon, 27 Nov 2023 14:19:34 +0200
Five new and noteworthy species of Epidendroideae (Orchidaceae) from southwestern China based on morphological and phylogenetic evidence https://phytokeys.pensoft.net/article/111230/ PhytoKeys 235: 211-236

DOI: 10.3897/phytokeys.235.111230

Authors: Ji-Dong Ya, Wan-Ting Wang, Yun-Long Liu, Hong Jiang, Zhou-Dong Han, Ting Zhang, Hua Huang, Jie Cai, De-Zhu Li

Abstract: Five new orchid species from southwestern China’s Yunnan Province and the Tibetan Autonomous Region, Neottia lihengiae, Neottia chawalongensis, Papilionanthe motuoensis, Gastrochilus lihengiae, and Gastrochilus bernhardtianus, are described and illustrated. To confirm their identities, and to resolve phylogenetic relationships, we sequenced the complete plastomes of these taxa with their congeneric species, adding new plastomes of three Neottia species, two Papilionanthe species and nine Gastrochilus species. Combined with published plastid sequences, our well-resolved phylogeny supported the alliance of N. lihengiae with the the N. grandiflora + N. pinetorum clade. Neottia chawalongensis is now sister to N. alternifolia, while P. motuoensis is closely related to P. subulata + P. teres. Conversely, phylogenetic analyses based on complete plastomes and plastid sequences showed inconsistent relationships among taxa in the genus Gastrochilus, but the two new species, G. lihengiae and G. bernhardtianus were supported by all datasets.

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Research Article Mon, 20 Nov 2023 17:20:38 +0200
Lysimachia cavicola (Primulaceae), a new species from Guangxi, China https://phytokeys.pensoft.net/article/109528/ PhytoKeys 235: 189-198

DOI: 10.3897/phytokeys.235.109528

Authors: You Nong, Yuan Fang, Chuan-Gui Xu, Gui-Yuan Wei, Ke-Jian Yan, Ren-Chuan Hu, Yuan-Guang Wen

Abstract: Lysimachia cavicola (Subgen. Idiophyton, Primulaceae), a new species from Guangxi, China, is here described and illustrated based on morphological data. Although it shares similarities with L. microcarpa, L. fooningensis, and L. capillipes, there are distinguishing characteristics that set it apart. These include erect stems either solitary or in clusters of 1 to 2, herbaceous, terete, and densely glandular hairy. The leaves are either ovate or elliptical lanceolate, with inconspicuously reticulate veins. The petiole measures 2–4 mm in length covered with minute glandular hairy. The corolla is deeply parted, measuring 6–8 mm in length, with narrowly elliptic or narrowly oblong lobes that are 1–2 mm wide. The capsule is globose, measuring 2–3 × 2–3 mm, and possesses a chalky, brittle texture, which splits into 5-valved segments. The calyx of the plant appears yellowish-white during fruiting. This newly discovered species is endemic to limestone areas in Fengshan County, Guangxi, China.

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Research Article Fri, 17 Nov 2023 18:03:05 +0200
Mazus motuoensis (Mazaceae), a new species from Xizang, China https://phytokeys.pensoft.net/article/111092/ PhytoKeys 235: 69-79

DOI: 10.3897/phytokeys.235.111092

Authors: Wen-Bin Ju, Xiong Li, Heng-Ning Deng, Meng Li, Xing-Jin He, Xin-Fen Gao, Bo Xu

Abstract: Mazus motuoensis W.B.Ju, Bo Xu bis & X.F.Gao is a newly described species found in Xizang Autonomous Region, China. Morphologically, this species differs from all the other known Mazus species by having erect perennial herb form with a rhizome, presence of multicellular hairs, without basal leaves, opposite arrangement of stem leaves, and corolla lobes with erose-toothed margins. Molecular phylogenetic analysis using nuclear and cpDNA genes suggests that this new species occupies a basal position within Mazus. In conclusion, both morphological evidence and molecular phylogenetic analyses support that this species belongs to Mazus and represents an as-yet-unreported new species with distinct differences from other species within the genus.

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Research Article Tue, 14 Nov 2023 17:36:42 +0200
Primula xilingensis (Primulaceae), a new species from Sichuan, China https://phytokeys.pensoft.net/article/108411/ PhytoKeys 234: 135-143

DOI: 10.3897/phytokeys.234.108411

Authors: Junjia Luo, Mingke Zhang, Xiaofeng Liu, Hui Chen, Tingyu Li, Xudong Ma, Ke Huang, Zhixi Fu

Abstract: A new species, Primula xilingensis K.Huang & Z.X.Fu, sp. nov. (Primulaceae), is described and illustrated. In gross morphology, it is clearly allied to section Minutissimae on account of having stolons, being glabrous, leaf rosette less than or equal to corolla, flower solitary and bract not swollen at base. The new species is easily distinguished by the combination of scape densely yellow farinose, leaf apex acute, rarely broadly obtuse, corolla pale purplish blue and style 3.0–6.0 mm above base of corolla tube, stamens reaching the corolla tube mouth in thrum flower. In addition, the distribution map, morphological comparison of related species and conservation status of the new species are also provided.

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Research Article Wed, 18 Oct 2023 10:57:16 +0300
Lagerstroemia stenophylla (Lythraceae), a new species from China https://phytokeys.pensoft.net/article/111861/ PhytoKeys 234: 127-133

DOI: 10.3897/phytokeys.234.111861

Authors: Bao-Huan Wu, Xing Hu, Wen-Hui Tu, Wei Wang, Se-Ping Dai

Abstract: Lagerstroemia stenophylla, a new species from southeastern Shaanxi Province and northwestern Hubei Province of China is described. Morphologically, L. stenophylla resembles L. subcostata, but it differs in having 4-angular, subalate branchlets, elliptic-lanceolate, or narrowly elliptic leaves, and relatively larger flowers.

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Research Article Fri, 13 Oct 2023 10:47:58 +0300
A new combination and a new synonym of Gesneriaceae in China https://phytokeys.pensoft.net/article/108644/ PhytoKeys 232: 99-107

DOI: 10.3897/phytokeys.232.108644

Authors: Zheng-Long Li, Zhang-Jie Huang, Da-Wei Chen, Xin Hong, Fang Wen

Abstract: Didymocarpus subpalmatinervis W.T.Wang was shown to be conspecific with Petrocodon lithophilus Y.M.Shui, W.H.Chen & Mich.Möller, by checking original literature, examining specimens, tracing specimen collecting history, and conducting field surveys. The results show morphological characteristics and geographical distribution overlaps between these two species. The transfer of Didymocarpus subpalmatinervis to Petrocodon as a new combination with Petrocodon subpalmatinervis (W.T.Wang) F.Wen & Z.L.Li is proposed here, and P. lithophilus is synonymized with P. subpalmatinervis. Color photographs and essential information are also provided, including a detailed comparison of description, distribution, habitat, and the proposed IUCN conservation status.

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Research Article Fri, 15 Sep 2023 10:21:23 +0300
Mitreola quanruii (Loganiaceae), a new species from a karst region in Guangxi, China https://phytokeys.pensoft.net/article/108986/ PhytoKeys 232: 67-75

DOI: 10.3897/phytokeys.232.108986

Authors: Renchuan Hu, Xiaowen Liao, Binsheng Luo, Cheng Liu, You Nong, Lei Wu

Abstract: Mitreola quanruii , a new species from Guangxi, China, is described and illustrated in this study. It is morphologically similar to M. liuyanii because of the terete stems, creeping and branched at the base, the leaves which are pilose on both surfaces and the bilobed capsules with two erect horns. The new species can be distinguished from M. liuyanii by its taller habit, up to 20–50 cm tall, its linear leaves, 4–18 × 0.3–1 cm with acuminate apex and 8–10 pairs of lateral veins, its narrowly triangular stipules, its linear bracts, ca. 1.0 cm long and glabrous and its glabrous calyx. Mitreola quanruii is temporarily assessed as data deficient (DD) according to IUCN. The habitat of Mitreola quanruii is extremely fragile. Therefore, this species deserves close attention and protection.

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Research Article Fri, 8 Sep 2023 10:33:01 +0300
Stauranthera floribunda, a new species of Gesneriaceae from Yunnan, China https://phytokeys.pensoft.net/article/108996/ PhytoKeys 232: 59-66

DOI: 10.3897/phytokeys.232.108996

Authors: Fan Su, Xiao-Wei Qin, Yun-Lei Wang, Ren-Fen Wang, Chao-Yun Hao, Ke Tan

Abstract: Stauranthera floribunda F.Su, C.Y.Hao & K.Tan, a new species of Gesneriaceae from Yunnan, China, is described and illustrated here. It is morphologically similar to S. grandifolia Benth. in the shape of corolla, stigma, leaves and the number of stamens. However, it can be readily distinguished from the compared species by its dense cymes, leaf indumentum, lack of a corolla spur, calyx colour and stamen shape. The description of the new species, photographs, detailed descriptions, notes on etymology, distribution and habitat, as well as comparisons with morphologically similar species, are provided.

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Research Article Thu, 7 Sep 2023 10:56:25 +0300
A new species of Hiptage (Malpighiaceae) from northwest Yunnan (China) based on molecular and morphological data https://phytokeys.pensoft.net/article/106675/ PhytoKeys 232: 45-57

DOI: 10.3897/phytokeys.232.106675

Authors: Tong-Tong Zhang, Shu-Yun Yang, Ke Tan, Ming-Xun Ren

Abstract: Hiptage stenopterum K.Tan & M.X.Ren, a new species of Hiptage collected from a deep valley close to the Nujiang Gorge, northwest of Yunnan Province, China, is described and illustrated based on molecular and morphological data. The new species was found isolated in an entrenched valley of the Laowo River, a tributary of the Nujiang River, at the northern edge of the distribution range of the genus. H. stenopterum shares some morphological similarities with the narrowly endemic H. incurvatum and H. lushuiensis. However, H. stenopterum is easily distinguished by its oblanceolate lateral wing of winged mericarp, 10 to 12 calyx glands, and branchlets densely rusty tomentose. The new species status is also supported by molecular phylogenetic analyses based on nuclear ribosome internal transcribed spacer (nrITS), which showed distinct systematic boundaries from the most morphologically similar species, H. incurvatum and their morphological relatives, H. lushuiensis.

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Research Article Mon, 4 Sep 2023 18:02:15 +0300
A new lithophilous species of Gesneriaceae, Petrocodon rubrostriatus, from the karst area of South Yunnan, China https://phytokeys.pensoft.net/article/106358/ PhytoKeys 230: 289-299

DOI: 10.3897/phytokeys.230.106358

Authors: Ke Tan, Di-Ya Chen, Xi-Qiang Song, Ming-Xun Ren

Abstract: A new lithophytic species of Gesneriaceae, Petrocodon rubrostriatus K.Tan, X.Q.Song & M.X.Ren, sp. nov. from Lvchun County, South Yunnan, China, is described and illustrated here. It closest resembles P. mollifolius (W.T.Wang) A.Weber & Mich.Möller, but the new species is differentiated from it by red to brownish-red stripes in the yellow corolla throat and 4.5 mm long bract lobes, a ca. 10 mm long style, and staminodes inserted at 2.5–3 mm from the corolla base. The species is preliminarily assessed as ‘Critically Endangered’ (CR) according to IUCN criteria, since currently only one single locality is known with a few subpopulations on a fragmented limestone cliff, with fewer than 300 individuals.

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Research Article Fri, 18 Aug 2023 18:31:04 +0300
Thrixspermum taeniophyllum (Orchidaceae, Epidendroideae), a new species from southwest China, based on molecular and morphological evidence https://phytokeys.pensoft.net/article/104273/ PhytoKeys 230: 145-156

DOI: 10.3897/phytokeys.230.104273

Authors: Jun-Yi Zhang, Yue-Hong Cheng, Min Liao, Gui-Ying Liu, Pan-Yan Yang, Bo Xu, Hai He

Abstract: Thrixspermum taeniophyllum is described as a new orchid species from Wenchuan County, Sichuan Province of southwest China. It is morphologically similar to T. japonicum, but it differs from the latter in having branched stems, slightly fleshy strap-shaped leaves, longer inflorescences with 3–6 flowers and a capitate gynandrium with a lip-shaped mouth opening. Its species status is also supported by molecular phylogenetic analyses, based on nuclear ribosome internal transcribed spacer (nrITS) and three chloroplast DNA fragments (matK, psbA-trnH and trnL-F), which showed distinct systematic boundaries from the most morphologically similar T. japonicum and their morphological relatives T. saruwatarii and T. pygmaeum.

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Research Article Mon, 7 Aug 2023 17:42:52 +0300
Primula medogensis, a new species of Primulaceae from Tibet of China https://phytokeys.pensoft.net/article/107008/ PhytoKeys 230: 107-114

DOI: 10.3897/phytokeys.230.107008

Authors: Wen-Bin Ju, Heng-Ning Deng, Feng Liu, Xing-Jin He, Xin-Fen Gao, Bo Xu

Abstract: We present a description of a newly discovered species, Primula medogensis, found in southern Xizang, China. Additionally, we explore distinctive morphological characteristics that aid in its taxonomy. The new species belongs to sect. Cordifoliae and exhibits morphological similarities to P. baileyana and P. rotundifolia. However, it can be distinguished by its densely grayish-haired roots, petioles that are 3–7 times longer than the leaf blades, a short stock surrounded by straight and withered petioles, reniform leaf blades with revolute margins, scapes shorter than or equal to leave and both at flowering and in fruiting, flowers solitary on the scapes.

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Research Article Fri, 4 Aug 2023 17:57:44 +0300
Sinosasa gracilis (Poaceae, Bambusoideae), a new combination supported by morphological and phylogenetic evidence https://phytokeys.pensoft.net/article/101164/ PhytoKeys 226: 53-63

DOI: 10.3897/phytokeys.226.101164

Authors: Xing Li, Jing-Bo Ni, Zhuo-Yu Cai, Yi-Hua Tong, Nian-He Xia

Abstract: The results of phylogenetic analysis, based on the whole chloroplast genome and morphological study support the transfer of a long ignored bamboo species, Sasa gracilis, to the recently established genus, Sinosasa, in this study. Morphologically, this species differs from all the other known Sinosasa species by having very short (2–3 mm) foliage leaf inner ligules, which is unusual in this genus. A revised description of its morphology and colour photos are also provided.

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Research Article Tue, 9 May 2023 15:26:20 +0300
The identity of Sasa oblongula C.H.Hu (Poaceae, Bambusoideae, Arundinarieae): evidence from morphology and molecular data https://phytokeys.pensoft.net/article/101221/ PhytoKeys 226: 17-32

DOI: 10.3897/phytokeys.226.101221

Authors: Xing Li, Jing-Bo Ni, Nian-He Xia

Abstract: Sasa oblongula was described in 1987 based on a cultivated plant at the bamboo garden of Sun Yat-sen University. This species has two or three branches at the upper nodes, which differ from the rest of Sasa species that have a single branch per node. During the field trip to Baishi Town, Yunfu City, Guangdong Province in July 2021, one bamboo species with oblong foliage leaves was collected and matches the isotype. Then, our question was to test the identity of S. oblongula concerning other Sasa species based on morphology and molecular data. To do that, we sequenced the whole chloroplast genome of S. oblongula and did a phylogenetic analysis. Our morphological results indicate that the new collection is S. oblongula. The phylogenetic tree showed that S. oblongula is close to Pseudosasa, instead of Sasa species. Therefore, we transferred it to the genus Pseudosasa, and a revised description of P. oblongula is provided here.

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Research Article Tue, 9 May 2023 15:24:22 +0300
Primulina jiulianshanensis, a new species of Gesneriaceae from Jiangxi Province, China https://phytokeys.pensoft.net/article/96351/ PhytoKeys 226: 1-16

DOI: 10.3897/phytokeys.226.96351

Authors: Guo-Liang Xu, Li-Fen Liang, Di-Ya Chen, Zhi-Fang Jing, Xiao-Hai Zuo, Zheng-Yu Zuo, Fang Wen

Abstract: Primulina jiulianshanensis F.Wen & G.L.Xu, a new species of Gesneriaceae from Jiulianshan National Nature Reserve of Jiangxi Province, China, is described and illustrated here. Molecular evidence showed it was sister to P. wenii Jian Li & L.J.Yan, while the morphological observation found clear differences between them, petiole, both sides of leaf blades, adaxial surface of the calyx lobes, corolla inside toward the bottom, bract margins covered glandular-pubescent hairs in P. jiulianshanensis (vs. no glandular-pubescent hairs in P. wenii); lateral bracts 4–9 × ca. 2 mm, the central one 2–5 × 1–1.5 mm, adaxially glabrous but sparsely pubescent at apex (vs. lateral bracts 14–16 × 2.5–3.0 mm, the central one 10–12 × 1.3–1.6 mm, all adaxially pubescent); calyx lobes 8–11 × ca. 2 mm, each side with several brown serrate teeth at apex (vs. 14–15 × ca. 2.5 mm, margin entire); filaments and staminodes sparsely yellow glandular-puberulent (vs. white, glabrous).

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Research Article Tue, 9 May 2023 10:57:14 +0300
Palynological features and taxonomic significance for 16 species of Gagea (Liliaceae) from Xinjiang, China https://phytokeys.pensoft.net/article/101518/ PhytoKeys 225: 53-68

DOI: 10.3897/phytokeys.225.101518

Authors: Musen Lin, Juan Qiu, Kaiqing Xie, Dunyan Tan

Abstract: Since pollen characters can be used to help distinguish species, our aim was to determine if palynological information has taxonomic significance for Gagea species from Xinjiang, China. Gagea is widely distributed in north temperate and the subtropical zones. The genus has limited taxonomic characteristics and large morphological variation, which results in difficulty of species classification. Pollen morphology of 16 species of this genus was examined comprehensively via light microscope (LM) and scanning electron microscope (SEM). One qualitative and nine quantitative traits of the pollen grains were surveyed, followed by hierarchical cluster analysis (HCA). The pollen grains were bilaterally symmetrical heteropolar monads with a mono-sulcus and they were oblate or peroblate (Polar diameter (P) / Equatorial diameter (E) = 0.36–0.73) in shape and medium to large (P = 17.17–34.64 μm, E = 27.63–81.65 μm) in size. Three types of exine ornamentation were observed: perforate, microreticulate and reticulate cristatum. The HCA divided the 16 species into two groups. This research provides new data on pollen morphology for Gagea (the pollen morphology of eight species was reported for the first time). Pollen morphology also can be used to identify species with similar external morphology, such as G. nigra and G. filiformis. Furthermore, the study of pollen morphology not only provides new data for palynology research on Gagea, but also provides a basis for future classification of this genus.

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Research Article Fri, 21 Apr 2023 16:51:39 +0300
Petrocodon wui (Gesneriaceae), a new species from Guizhou, China https://phytokeys.pensoft.net/article/99660/ PhytoKeys 225: 41-51

DOI: 10.3897/phytokeys.225.99660

Authors: Ren-Bo Zhang, Tan Deng, Nan Li, Fang Wen

Abstract: Petrocodon wui F.Wen & R.B.Zhang (Gesneriaceae), a typically lithophyte occurring in the Danxia areas of north-western Guizhou, China, is described and illustrated as new to science. The new species shows overall similarity with P. chishuiensis Z.B.Xin, F.Wen & S.B.Zhou, which is also its sister species, based on molecular evidence. The new species can be distinguished from P. chishuiensis by the elongated rhizome, the relatively long indumentum on the peduncle, the shape, size and indumentum of calyx lobes, the location of the stamens in the corolla tube and the shape, size and indumentum of the stigma. We provide a diagnosis, detailed description, photographic images and a table with taxonomic notes to distinguish several other morphologically similar Petrocodon species.

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Research Article Wed, 19 Apr 2023 10:48:56 +0300
Endiandra macrocarpa (Lauraceae), a new tree species from south-western China https://phytokeys.pensoft.net/article/102752/ PhytoKeys 224: 183-192

DOI: 10.3897/phytokeys.224.102752

Authors: Dian-yang Zou, Guan-long Cao, Jin-guo Zhang, Lang Li, Jie Li

Abstract: Endiandra macrocarpa, a new species of Endiandra (Lauraceae) from Yunnan Province of south-western China, is here described and illustrated, based on morphological evidence. Compared to other Endiandra species occurring in south China and the adjacent regions in Indochina, this species is mainly characterised by its much larger ellipsoidal fruits (up to 11 × 6 cm), as well as glabrous branchlets and puberulent inflorescences.

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Research Article Fri, 7 Apr 2023 17:47:17 +0300
Resurrection of Leucobryum scalare Müll.Hal. ex M.Fleisch. (Bryophyta, Leucobryaceae) based on phylogenetic and morphometric evidence https://phytokeys.pensoft.net/article/98990/ PhytoKeys 222: 27-47

DOI: 10.3897/phytokeys.222.98990

Authors: Patsakorn Tiwutanon, Kasidis Chaiyasut, H. Thorsten Lumbsch, Ekaphan Kraichak

Abstract: Leucobryum scalare was described in 1904 but its taxonomic status has been disputed, being reduced to a variety of Leucobryum aduncum or synonymized with Leucobryum aduncum. The taxonomic confusion of this taxon has remained unresolved. Hence, we revisited the taxonomic status of the taxon using phylogenetic and morphometric approaches. A total of 27 samples from Leucobryum aduncum var. aduncum and Leucobryum aduncum var. scalare were used to generate data from four markers, including ITS1, ITS2, atpB-rbcL spacer, and trnL-trnF. The concatenated dataset was used to reconstruct a phylogenetic tree. Both qualitative and quantitative morphological characters were measured and analyzed with Principal Component Analysis (PCA) and PERMANOVA. The results showed that the two taxa are closely related but they are reciprocally monophyletic. Both qualitative and quantitative characters could also separate Leucobryum aduncum var. scalare from Leucobryum aduncum var. aduncum as shown with PCA and PERMANOVA. We propose the resurrection of the species rank for Leucobryum scalare as separate from Leucobryum aduncum. This work highlights the need for a more thorough revision of Leucobryum to clarify the actual level of diversity in this genus.

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Research Article Mon, 20 Mar 2023 12:40:20 +0200
Kengiochloa, a new bamboo genus to accommodate the morphologically unique species, Pseudosasa pubiflora (Poaceae) https://phytokeys.pensoft.net/article/98920/ PhytoKeys 221: 131-145

DOI: 10.3897/phytokeys.221.98920

Authors: Yi-Hua Tong, Zheng-Yang Niu, Zhuo-Yu Cai, Jing-Bo Ni, Nian-He Xia

Abstract: Pseudosasa was confirmed as polyphyletic by recent phylogenetic analyses, with Chinese species of Pseudosasa distantly related to those from Japan. Among the Chinese species of Pseudosasa, Pseudosasa pubiflora is a morphologically unique as well as taxonomically problematic species endemic to South China, of which the generic designation is still uncertain. Molecular analyses based on both plastid and nuclear genomic data demonstrated that this species is closest to the recently published genus Sinosasa. Morphologically, the two are somewhat similar to each other in flowering branches developing at the nodes of every order of branches, raceme-like units of inflorescence with 3–5 short spikelets, each spikelet with few florets including a rudimentary one at the apex, and each floret with 3 stamens and 2 stigmas. However, P. pubiflora is very different from Sinosasa species in many reproductive and vegetative characters, such as the morphology of paracladia (lateral spikelet “pedicels”), the absence or existence of pulvinus at the base of paracladia, the relative length of the upper glume and the lowest lemma, the shape of lodicules and primary culm buds, the branch complement, the morphology of nodes, culm leaves and dried foliage leaf blades, and the number of foliage leaves per ultimate branchlet. The morphological and molecular evidence warrants recognition of a new genus to accommodate this unique species, which is here named Kengiochloa. After consulting related literature and examination of herbarium specimens or specimen photos, a taxonomic revision of K. pubiflora and its synonyms was made, and it was confirmed that four names, viz. P. gracilis, Yushania lanshanensis, Arundinaria tenuivagina and P. parilis, should be merged with K. pubiflora, while Indocalamus pallidiflorus and Acidosasa paucifolia are distinct species.

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Research Article Mon, 13 Mar 2023 18:53:14 +0200
A new species of Sedum (Crassulaceae) from Mount Danxia in Guangdong, China https://phytokeys.pensoft.net/article/97495/ PhytoKeys 221: 117-129

DOI: 10.3897/phytokeys.221.97495

Authors: Yan-Shuang Huang, Kai-Kai Meng, Yuan-Yuan Sun, Zai-Xiong Chen, Qiang Fan

Abstract: Sedum jinglanii, a new species of Crassulaceae from Mount Danxia in Guangdong, China, is described and illustrated. Phylogenetic analysis based on the internal transcribed spacer (ITS) region of nrDNA suggests that the new species belongs to S. sect. Sedum sensu Fu and Ohba (2001) in the “Flora of China”, and is sister to a clade comprising S. alfredi and S. emarginatum with high support values (SH-aLRT = 84, UFBS = 95) but is distantly related to S. baileyi. The new species is morphologically similar to S. alfredi but it can be distinguished from the latter in its opposite leaves (vs. alternate leaves), its usually wider leaves (0.4–1.2 cm vs. 0.2–0.6 cm), its usually shorter petals (3.4–4.5 mm vs. 4–6 mm), its shorter nectar scales (0.4–0.5 mm vs. 0.5–1 mm), its shorter carpels (1.5–2.6 mm vs. 4–5 mm), and its shorter styles (0.6–0.9 mm vs. 1–2 mm). The new species can be easily distinguished from S. emarginatum which both have opposite leaves by its short, erect or ascending rhizome (vs. long and prostrate rhizome in the latter), shorter petals (3.4–4.5 mm vs. 6–8 mm) and shorter carpels (1.5–2.6 mm vs. 4–5 mm). It can also be easily distinguished from S. baileyi by its short, erect or ascending rhizome (vs. long and prostrate rhizome) and its shorter style (0.6–0.9 mm vs. 1–1.5 mm).

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Research Article Fri, 10 Mar 2023 21:06:41 +0200
Veronica hongii (Plantaginaceae), a new species from Central China https://phytokeys.pensoft.net/article/96550/ PhytoKeys 220: 59-64

DOI: 10.3897/phytokeys.220.96550

Authors: Song-Zhi Xu, Qi-Liang Gan, Zun-Wei Ke, Zhen-Yu Li

Abstract: A new species Veronica hongii, from western Hubei Province, Central China is described and illustrated. The species is morphologically similar to V. henryi Yamazaki, but mainly differs in the glabrous plant, except pedicels, broadly ovate leaf blades, glandular-pubescent pedicels, obovate calyx lobes, smaller corolla, broadly ovate capsule and much smaller seeds.

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Research Article Fri, 24 Feb 2023 18:32:37 +0200
Taxonomic notes on the genus Deutzia (Hydrangeaceae) from Central China https://phytokeys.pensoft.net/article/96623/ PhytoKeys 220: 51-57

DOI: 10.3897/phytokeys.220.96623

Authors: Song-Zhi Xu, Qi-Liang Gan, Zhen-Yu Li

Abstract: Based on examination of syntype specimens deposited at P, the lectotype for the name Deutzia setchuenensis Franch. is designated here. By consulting literature and specimen records, the type locality of D. setchuenensis var. longidentata Rehder, ‘Chin-Ting shan’ in the protologue is likely a misspelling of ‘Chiuting shan’ which is now called Jiuding shan located in southern Mao county, Sichuan province. In addition, a new variety, Deutzia setchuenensis var. macrocarpa Q.L.Gan, Z.Y.Li & S.Z.Xu from western Hubei, Central China, is described and illustrated. It differs from other varieties of D. setchuenensis Franch. by the orange anthers, broader outer filaments, obtuse inner filaments, and larger fruits.

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Research Article Fri, 24 Feb 2023 18:21:55 +0200
Comprehensive molecular and morphological analysis of Brachystemma calycinum and Stellaria ovatifolia in the tribe Alsineae (Caryophyllaceae) https://phytokeys.pensoft.net/article/96126/ PhytoKeys 220: 1-16

DOI: 10.3897/phytokeys.220.96126

Authors: Wen-Qiao Wang, Zhi-Wei Su, Zhong-Hui Ma

Abstract: Over the course of the recent decade, the composition of Alsineae has been drastically changed by means of molecular phylogeny. However, the genus Brachystemma has not been sampled in any of the previous studies, and its phylogenetic position is still pending. In addition, the related species Stellaria ovatifolia, which has at times been placed in Brachystemma, Schizotechium, or Stellaria, has also not been sampled. Here, nuclear ribosomal internal transcribed spacer (ITS) and four plastid regions (trnL-F, matK, rbcL, rps16) were used to conduct phylogenetic analyses within Caryophyllaceae and the tribe Alsineae. Ancestral characters (petal margin and number of seeds) were reconstructed in the tribe Alsineae based on the phylogenetic results. Our results indicate that Brachystemma is nested in the tribe Alsineae and forms a monophylum with S. ovatifolia, and apically lobed petals and numerous seeds may be the ancestral characters in the tribe Alsineae. Based on our study, Stellaria ovatifolia should be considered within Brachystemma, and Brachystemma is clearly a separate genus and now includes two species.

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Research Article Wed, 22 Feb 2023 16:54:41 +0200
Paraphlomis yingdeensis (Lamiaceae), a new species from Guangdong (China) https://phytokeys.pensoft.net/article/97547/ PhytoKeys 219: 107-120

DOI: 10.3897/phytokeys.219.97547

Authors: Guo-Xin Guo, Wan-Yi Zhao, Ya-Ping Chen, Jin-Hai Xiao, Yuan-Qiu Li, Qiang Fan

Abstract: Paraphlomis yingdeensis (Lamiaceae), a new species from the limestone area in northern Guangdong Province, China, is described and illustrated. Phylogenetic analyses, based on two nuclear DNA regions (ITS and ETS) and three plastid DNA regions (rpl32-trnL, rps16 and trnL-trnF), suggest that P. yingdeensis represents a distinct species in Paraphlomis. Morphologically, P. yingdeensis is similar to P. foliata subsp. montigena and P. nana, but can be distinguished from the former by its densely villous lamina and calyx, not decurrent base of lamina and bristle-like-acuminate apex of calyx teeth, and distinguished from the latter by its significantly taller plant (15–20 cm vs. 1–5 cm) and larger lamina (6.2–16.5 × 4–11.5 vs. 2–7 × 1.5–4 cm), densely villous stem, lamina and calyx and yellow corolla.

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Research Article Wed, 8 Feb 2023 15:05:14 +0200
Astragalus bashanensis (Leguminosae), a new species from Central China https://phytokeys.pensoft.net/article/96916/ PhytoKeys 219: 49-55

DOI: 10.3897/phytokeys.219.96916

Authors: Song-Zhi Xu, Qi-Liang Gan, Xin-Wei Li

Abstract: A new species Astragalus bashanensis, from western Hubei Province, Central China is described and illustrated. The new species is morphologically similar to Astragalus sinicus and A. wulingensis, but differs from both by its spreading pubescent indumentum on stems and petioles, longer petioles, white bracts, whitish or yellow corolla, longer claw of the keel-petal, hairy pods and smaller seeds.

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Research Article Tue, 24 Jan 2023 17:19:33 +0200
A taxonomic revision of Cynanchum thesioides (Apocynaceae) with two new synonyms https://phytokeys.pensoft.net/article/93514/ PhytoKeys 219: 11-25

DOI: 10.3897/phytokeys.219.93514

Authors: Cai-Fei Zhang, Dong-Juan Zhang, Miao Liao, Guang-Wan Hu

Abstract: Cynanchum thesioides, a species widely distributed in north-eastern Asia, is revised to include two new synonyms: Vincetoxicum sibiricum f. linearifolium, described from Shandong, China in 1877, but long neglected and Cynanchum gobicum, previously believed to be endemic to Mongolia. Typification for C. thesioides and all its synonyms is given, including lectotypification of V. sibiricum var. australe and V. sibiricum f. linearifolium. An updated description, three figures showing the diverse habitats, habits and variation in morphological characters, and a general distribution map are also provided.

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Research Article Thu, 19 Jan 2023 07:51:08 +0200
Yushania tomentosa (Poaceae, Bambusoideae), a new combination from Guangxi https://phytokeys.pensoft.net/article/97312/ PhytoKeys 218: 11-18

DOI: 10.3897/phytokeys.218.97312

Authors: Xing Li, Jing-Bo Ni, Fei Tan, Yi-Hua Tong, Nian-He Xia

Abstract: Sasa tomentosa is transferred to the genus Yushania following a reassessment based on a new collection with pachymorph and long-necked rhizomes from its type locality in Guangxi, China. Morphologically, it is most similar to Yushania doupengshanensis, but differs in culm, branch complement and foliage leaf characters. A revised description of its morphology and color photos are also provided.

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Research Article Tue, 10 Jan 2023 20:37:28 +0200
Argostemma ehuangzhangense (Rubiaceae), a new species from Guangdong, China https://phytokeys.pensoft.net/article/89276/ PhytoKeys 214: 75-82

DOI: 10.3897/phytokeys.214.89276

Authors: Zhong-Cheng Liu, Jia Liu, Wan-Yi Zhao, Qiang Fan, Hua-Gu Ye, Lei Wang, Wen-Bo Liao

Abstract: Argostemma ehuangzhangense, a new Rubiaceae species from E’huangzhang Nature Reserve, Guangdong Province, China, is here described and illustrated. A morphological comparison between the new species and its putative relatives, A. lamxayanum, A. laotica and A. verticillatum, is presented. The new species is mostly similar to A. laotica, but they can be distinguished from each other since Argostemma ehuangzhangense presents solitary flower (vs. 2-flowered inflorescences), flower lobes 4 (vs. 5) and anthers opening by longitudinal slits (vs. apical pores). In a preliminary IUCN Red List status of Argostemma ehuangzhangense this species is assigned as Vulnerable (VU).

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Research Article Wed, 30 Nov 2022 10:55:48 +0200
A new synonym of Enkianthus perulatus (Ericaceae) in East Asia, based on morphological and molecular evidence https://phytokeys.pensoft.net/article/94294/ PhytoKeys 214: 61-74

DOI: 10.3897/phytokeys.214.94294

Authors: Hua Liang, Lu Jiang, Danqi Li, Yi Yang, Dengmei Fan, Zhiyong Zhang

Abstract: Enkianthus calophyllus was once treated as a synonym of E. serrulatus. However, field observations indicate that E. calophyllus is distinct from E. serrulatus but resembles E. perulatus in flowers, leaves, fruits and seeds. Hence, a taxonomic revision of these species was conducted based on morphological comparisons of flowers, leaves, fruits and seeds, as well as molecular analyses of nuclear ribosomal internal transcribed spacer (nrITS) and six plastid DNA markers (psbA-trnH, rpl32-trnL, trnL-trnF, rps16-trnQ, psbJ-petA and matK). The morphological and molecular results reject the synonymization of E. calophyllus with E. serrulatus, and instead show it to be placed in a clade with E. perulatus. Based on molecular evidence and a reassessment of the morphology we synonymize E. calophyllus with the older name E. perulatus.

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Research Article Fri, 25 Nov 2022 10:14:56 +0200
Eriobotrya crassifolia (Rosaceae), a new species from Yunnan Province, China https://phytokeys.pensoft.net/article/96425/ PhytoKeys 214: 17-25

DOI: 10.3897/phytokeys.214.96425

Authors: Kai-Kai Meng, Su-Fang Chen, Min Lin, Wen-Bo Liao, Jian-Hua Jin, Qiang Fan

Abstract: The new species Eriobotrya crassifolia, collected from Yunnan Province, China, is characterised and illustrated. A phylogeny based on chloroplast genomes supported its closest affinity with E. tengyuehensis, while a phylogeny based on 197 single-copy nuclear genes supported its closest affinity with E. fragrans and E. deflexa. Morphologically, however, it resembles E. angustissima. Nevertheless, it can be easily distinguished from E. angustissima by its abaxially retroflexed and sharply serrate leaf margins, densely rusty tomentose inflorescences, and oblong or elliptic leaves.

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Research Article Tue, 22 Nov 2022 18:02:10 +0200
The floral morphology of four Chinese Bambusa species (Poaceae, Bambusoideae) previously described only from vegetative material https://phytokeys.pensoft.net/article/95614/ PhytoKeys 213: 143-159

DOI: 10.3897/phytokeys.213.95614

Authors: Qiao-Mei Qin, Zhuo-Yu Cai, Jing-Bo Ni, Yi-Hua Tong, Nian-He Xia

Abstract: Due to their specialised flowering biology where frequent or even annual flowering is uncommon, reproductive materials of bamboos are not always available, so hampering taxonomic interpretation and research into other aspects. Bambusa contracta, B. corniculata, B. cornigera and B. subtruncata were established only based on vegetative materials and flowering or fruiting material has been hitherto unknown. The floral morphology of these four species is described for the first time and, correspondingly, epitypes are designated to support a more complete interpretation of the species.

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Research Article Wed, 16 Nov 2022 10:41:05 +0200
Wikstroemia fragrans (Thymelaeaceae, Daphneae), a new species from Mount Danxia, China based on morphological and molecular evidence https://phytokeys.pensoft.net/article/91116/ PhytoKeys 213: 67-78

DOI: 10.3897/phytokeys.213.91116

Authors: Jing-Rui Chen, Shiou Yih Lee, Jian-Qiang Guo, Jie-Hao Jin, Qiang Fan, Wen-Bo Liao

Abstract: A new species, Wikstroemia fragrans (Thymelaeaceae, Daphneae), from Danxiashan National Park, Shaoguan, Guangdong of China is described and illustrated. It is similar to the sympatric W. trichotoma, but can be differentiated easily from the latter by its shorter racemose inflorescences, yellowish green calyx tube, and smaller leaves. It also resembles the allopatric W. fargesii, but differs from it by its strigose-pubescent ovary and disk scale that is 2- or 3-dentate apically. Phylogenetic analysis using the nuclear DNA internal transcribed spacer (ITS) region revealed that W. fragrans falls within the Wikstroemia clade; based on current sampling, W. fragrans is closely-related to W. capitata. It is also the first species of Wikstroemia known to be endemic to the Danxia landform and is classified provisionally as Critically Endangered according to the IUCN Red List Categories and Criteria.

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Research Article Thu, 10 Nov 2022 10:40:30 +0200
Hemipilia avisoides (Orchidaceae), a new species from Sichuan Province, China https://phytokeys.pensoft.net/article/90377/ PhytoKeys 213: 1-18

DOI: 10.3897/phytokeys.213.90377

Authors: Xue-Man Wang, Ying Tang, Pei-Hao Peng, Hua Peng

Abstract: A new orchid species, Hemipilia avisoides, is described from Songpan County and Maoxian County, Sichuan Province, China. Morphologically, H. avisoides is most similar to H. hui, but can be distinguished by the combination of its involute middle lip lobe that is smaller than the lateral lobes, floral bracts that are 5 mm long and are always shorter than the ovary, a leaf that is appressed to the substrate and is adaxially green with white lines along 7–9 principal veins and the subterranean stem with a solitary sheath at its base. The floral morphology of H. avisoides is presented by utilising in vivo micro-CT scanning and 3D visualisation.

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Research Article Mon, 7 Nov 2022 16:07:53 +0200
Paraphlomis hsiwenii (Lamiaceae), a new species from the limestone area of Guangxi, China https://phytokeys.pensoft.net/article/91174/ PhytoKeys 212: 85-96

DOI: 10.3897/phytokeys.212.91174

Authors: Ya-Ping Chen, Jin-Fei Xiao, Chun-Lei Xiang, Xiong Li

Abstract: The indumentum of nutlets is shown to be of phylogenetic importance in previous molecular phylogenetic studies of Paraphlomis, a genus of Lamiaceae with approximately 30 species distributed mainly in southern China and Southeast Asia. Nearly half the species of Paraphlomis are known from limestone areas. In this study, we described and illustrated a new species, P. hsiwenii, from the karst mountain forests in Guangxi Zhuang Autonomous Region, China. Our molecular phylogenetic analyses revealed that P. hsiwenii is recovered in a clade consisting of species with hairy nutlets. The new species is morphologically most similar to P. pagantha from the same clade, but they differ in the morphology of lamina bases, length of pedicels and calyces, as well as the morphology of upper corolla lips.

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Research Article Thu, 3 Nov 2022 10:53:51 +0200
Further clarification on Androsace mollis Hand.-Mazz. (Primulaceae), with a description of a new species of Androsace https://phytokeys.pensoft.net/article/94037/ PhytoKeys 212: 73-83

DOI: 10.3897/phytokeys.212.94037

Authors: Yuan Xu, Hai-Fei Yan, Gang Hao

Abstract: The syntypes (H.R.E. Handel-Mazzetti 8896 and H.R.E. Handel-Mazzetti 9280) of Androsace mollis Hand.-Mazz. are identified as two separate taxa based on critical examinations of herbarium specimens and field investigation. While H.R.E. Handel-Mazzetti 8896 has been designated as the lectotype of A. mollis, we describe the other taxon, represented by H.R.E. Handel-Mazzetti 9280, as A. chimingiana Y.Xu & G.Hao sp. nov. The new species is morphologically similar to A. hookeriana Klatt and A. laxa C.M.Hu & Y.C.Yang but can be easily differentiated by its white corolla and obovate bracts.

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Research Article Thu, 3 Nov 2022 10:53:29 +0200
 Primula surculosa (Primulaceae), a new species from Yunnan, China https://phytokeys.pensoft.net/article/91133/ PhytoKeys 212: 29-35

DOI: 10.3897/phytokeys.212.91133

Authors: Yuan Xu, De-Ming He, Lin-Zhong Yang, Gang Hao

Abstract: A new species, Primula surculosa, is described and illustrated. In gross morphology, it is clearly allied to section Petiolares and is most similar to P. taliensis from the group Taliensis, but is distinctive in its indumentum in the throat of the corolla tube, and the markedly stoloniferous habit.

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Research Article Fri, 28 Oct 2022 07:24:14 +0300
Hemiboea kaiyangensis, a new species of Gesneriaceae endemic to Guizhou, China https://phytokeys.pensoft.net/article/85630/ PhytoKeys 211: 63-73

DOI: 10.3897/phytokeys.211.85630

Authors: Tao Peng, Shun-Zhi He, Shun-Li Wang, Dan Huang, Xu-Ping Zhou

Abstract: A new species of Gesneriaceae from Guizhou, China, Hemiboea kaiyangensis sp. nov., is described and illustrated. We investigated its phylogenetic position and relationships with 13 other species of Hemiboea C.B.Clarke, which present large morphological diversity in the genus, based on molecular analyses of the nuclear ribosomal internal transcribed spacer (ITS) and the chloroplast trnL-F intron-spacer sequences. The molecular phylogenetic analyses revealed that the new species is most closely related to H. ovalifolia. A diagnostic table and discussion of morphological characters are provided to differentiate the new species from H. longisepala, H. flaccida and H. ovalifolia.

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Research Article Fri, 14 Oct 2022 14:30:15 +0300
Resurrection of Drypetes nienkui (Putranjivaceae), endemic to Hainan, China https://phytokeys.pensoft.net/article/87737/ PhytoKeys 206: 129-136

DOI: 10.3897/phytokeys.206.87737

Authors: Geoffrey A. Levin

Abstract: Drypetes nienkui (Putranjivaceae), described from Hainan, China, has long been treated as a synonym of D. indica. Both species belong to a distinctive group of Asian species characterized by perulate buds that give rise to shoots bearing flowers or inflorescences proximally and leaves distally, 2–3-carpellate ovaries, and elongate styles. However, D. nienkui fundamentally differs from D. indica in inflorescence architecture and fruiting pedicel length; these or other characters also distinguish D. nienkui from the remaining species in this group. Drypetes nienkui therefore deserves recognition as a distinct species endemic to Hainan. An expanded description of the species is provided along with a key to the related species.

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Research Article Mon, 12 Sep 2022 09:04:20 +0300
Ficus motuoensis (Moraceae), a new species from southwest China https://phytokeys.pensoft.net/article/89338/ PhytoKeys 206: 119-127

DOI: 10.3897/phytokeys.206.89338

Authors: Zhen Zhang, Mei-Jiao Zhang, Jian-Hang Zhang, De-Shun Zhang, Hong-Qing Li

Abstract: A new climbing species, Ficus motuoensis Zhen Zhang & Hong Qing Li in Moraceae from southwest China has been described and illustrated in this paper. The new species resembles F. disticha, F. diversiformis and F. hederacea, but differs from these in the medium-sized acrophylls, shorter peduncle, as well as larger and spotted syconium. According to the morphological traits and phylogenetic placement, the new species belongs to Ficus subg. Synoecia sect. Apiosycea. Besides, the new species deviates from the common distribution pattern compared to the other members of sect. Apiosycea, indicating that it could be very useful for exploring the biogeography of sect. Apiosycea.

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Research Article Tue, 6 Sep 2022 11:02:22 +0300
Phylogeny and classification of the Australasian and Indomalayan mimosoid legumes Archidendron and Archidendropsis (Leguminosae, subfamily Caesalpinioideae, mimosoid clade) https://phytokeys.pensoft.net/article/79381/ PhytoKeys 205: 299-333

DOI: 10.3897/phytokeys.205.79381

Authors: Gillian K. Brown, Javier Aju, Michael J. Bayly, Daniel J. Murphy, Todd G. B. McLay

Abstract: The morphologically variable genus Archidendron is the second largest mimosoid legume genus from the Indomalayan-Australasian region, yet it has not been well represented in phylogenetic studies. Phylogenies that have included multiple representatives of Archidendron suggest it may not be monophyletic, and the same applies to Archidendropsis, another understudied genus of the Archidendron clade. The most comprehensive phylogeny of Archidendron and Archidendropsis to date is presented, based on four nuclear markers (ITS, ETS, SHMT and RBPCO). Exemplars from all genera of the wider Archidendron clade are sampled, including representatives of all series within Archidendron and the two subgenera of Archidendropsis. Our results confirm that Archidendron and Archidendropsis are not monophyletic. Within Archidendron, only one series (ser. Ptenopae) is resolved as monophyletic and species of Archidendron are divided into two primarily geographic lineages. One clade is distributed in western Malesia and mainland Asia and includes most representatives of series Clypeariae, while the other is mostly restricted to eastern Malesia and Australia and includes representatives of the seven other series plus two samples of series Clypeariae. No taxonomic changes are made for Archidendron due to the high level of topological uncertainty and the lack of discrete macromorphological characters separating these two lineages. Each of the two subgenera of Archidendropsis is monophyletic but they are not closely related. A new genus endemic to Queensland (Australia), Heliodendron Gill.K. Br. & Bayly, gen. nov., is described for the former Archidendropsis subg. Basaltica, and combinations for its three species are proposed: Heliodendron basalticum (F. Muell.) Gill.K. Br. & Bayly, comb. nov., Heliodendron thozetianum (F. Muell.) Gill.K. Br. & Bayly, comb. nov., and Heliodendron xanthoxylon (C.T. White & W.D. Francis) Gill.K. Br. & Bayly, comb. nov.

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Research Article Mon, 22 Aug 2022 19:00:11 +0300
A new freshwater species Achnanthidium kangdingnese (Bacillariophyta, Achnanthidiaceae) from Sichuan Province, China https://phytokeys.pensoft.net/article/89690/ PhytoKeys 204: 97-108

DOI: 10.3897/phytokeys.204.89690

Authors: Pan Yu, Qingmin You, Yonghong Bi, Quanxi Wang

Abstract: A new freshwater diatom species, Achnanthidium kangdingnese Yu, You & Wang, sp. nov. from Sichuan Province, China, is described. The morphology of this species was analyzed with scanning electron microscopy (SEM) and light microscopy (LM). A. kangdingnese belongs to the A. initium-like subgroup, which has external distal raphe ends curved in opposite directions of the valve. The main characteristics of A. kangdingnese are its linear shape, rounded apices and transpically-elongated areolae on the both valves. The central area is well defined with one or two spaced striae of the raphe valve. And on the internal valve, areolae are occluded by hymens perforated by delicate slits, and each hymen is closely joined with the adjacent hymen. We compared the new species with other similar species of Achnanthidium, A. kangdingnese is considered to be sufficiently different from other similar species based on valve outline, shape of the axial and center areas, and striae density. The new species is known only from its type locality, a mountain lake in Kangding County.

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Research Article Fri, 12 Aug 2022 19:16:18 +0300
Paraphlomis jinggangshanensis (Lamiaceae), a new species from Jiangxi, China https://phytokeys.pensoft.net/article/87654/ PhytoKeys 204: 1-8

DOI: 10.3897/phytokeys.204.87654

Authors: Wan-Yi Zhao, Zhong Zhang, Qiang Fan, Chun-Quan Chen, Wen-Bo Liao, David E. Boufford

Abstract: Paraphlomis jinggangshanensis (Lamiaceae), a new species from Jiangxi Province, China, is described and illustrated. The new species is morphologically similar to P. intermedia, but can be easily distinguished from the latter by its cordate leaf base (vs. cuneate, decurrent), stem and calyx tube with glandular hairs (vs. short pubescent), and glabrous anthers (vs. ciliate anthers). A phylogenetic analysis, based on ITS regions, suggests that P. jinggangshanensis represents a separate branch in Paraphlomis and is closely related to Clade II. It is currently known only from Jinggangshan National Natural Reserve. Because of its limited distribution and small population size, the species was assessed as Near Threatened (NT) according to the IUCN Red List Categories and Criteria.

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Research Article Tue, 2 Aug 2022 14:48:46 +0300
Erythroxylum austroguangdongense (Erythroxylaceae), a new species from Guangdong, China https://phytokeys.pensoft.net/article/84688/ PhytoKeys 202: 133-138

DOI: 10.3897/phytokeys.202.84688

Authors: Chun-Mei He, Xin-Xin Zhou, Xue-He Ye, Weijun Chen, Yi-Hua Tong

Abstract: Erythroxylum austroguangdongense (Erythroxylaceae), a new species from Guangdong Province, China, is described and illustrated. This new species is morphologically most similar to E. calyptratum, but is distinguished by the leathery leaf blade with fewer pairs of secondary veins and flowers borne on leafless nodes of the basal part of the current branch with much longer pedicels and sub-rectangular petal appendages. This is the second native species of Erythroxylum recorded from China.

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Research Article Fri, 29 Jul 2022 18:26:07 +0300
Novelties on the genus Vaccinium (Ericaceae) from Hainan, China: a new species and a new record for the country https://phytokeys.pensoft.net/article/82786/ PhytoKeys 202: 121-132

DOI: 10.3897/phytokeys.202.82786

Authors: Xue-He Ye, Qing-Long Wang, Ming-Zhong Huang, Yi-Hua Tong

Abstract: Here we describe a new species, Vaccinium pseudopubicalyx, and report a new record for the flora of China, V. viscifolium, both from Hainan Province. Vaccinium viscifolium also represents the first record of V. sect. Euepigynium for China. Detailed descriptions and illustrations with analytical photographs of the two taxa are provided.

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Research Article Fri, 29 Jul 2022 18:25:32 +0300
Rungia fangdingiana (Acanthaceae), a new species from Guangxi, China https://phytokeys.pensoft.net/article/86653/ PhytoKeys 202: 97-105

DOI: 10.3897/phytokeys.202.86653

Authors: Zhe-Li Lin, Yun-Hong Tan, Yun-Feng Huang, Yun-Fei Deng

Abstract: Rungia fangdingiana, a new species of Acanthaceae from Guangxi, China is described and illustrated. This new species belongs to Rungia sect. Rungia, and resembles R. sinothailandica and R. burmanica in the erect perennial herbaceous habit, elliptic leaves and inflorescence form, but differs mainly by the indumentum and the morphology of the bracts and corolla. The pollen and seed micromorphology of this new species are studied, with photographs and a line drawing provided.

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Research Article Thu, 28 Jul 2022 10:57:13 +0300
Euonymus aquifolium (Celastraceae): Rediscovered in flowering with respect to its taxonomy, nomenclature, and rarity https://phytokeys.pensoft.net/article/86180/ PhytoKeys 201: 139-151

DOI: 10.3897/phytokeys.201.86180

Authors: Jun Hu, Jun-Yi Zhang, Ding-Xiang Yu, Hong Jiang, Bo Xu, Qing Liu, Hai He

Abstract: A small population of Euonymus aquifolium (Celastraceae) with flowering plants was discovered more than 100 kilometers away from its type locality. The incomplete original description of this species is supplemented here with floral materials since it is known from only two gatherings of fruiting specimens. Its 5-merous flowers and two ovules per locule support its position in Euonymus, and this inference is further reinforced by phylogenetic analysis based on the nuclear internal transcribed spacer (ITS) of rDNA. The specific epithet has long been treated as “aquifolius” to agree with the generic gender of Euonymus. But after examination of the protologues of this and other related species described simultaneously by the same authors, as well as their handwritten annotations attached on the type specimens, we conclude that the epithet aquifolium was used as a noun and it should be retained unchanged. Despite this newly discovered population some 100 kilometers away from its type locality, this species is still assessed as Critical Endangered (CR) according to the IUCN Red List Categories and Criteria.

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Research Article Tue, 5 Jul 2022 18:21:40 +0300
Oreocharis guangwushanensis, a new species of Gesneriaceae from Sichuan Province, China https://phytokeys.pensoft.net/article/77574/ PhytoKeys 201: 123-129

DOI: 10.3897/phytokeys.201.77574

Authors: Zheng-Long Li, Hai-Jun Ma, Zheng-Rong Ye, De-Chang Meng, Fang Wen, Xin Hong

Abstract: A new species of Oreocharis, O. guangwushanensis from the Sichuan Province of south-western China, is described and illustrated here. This new species has a pink corolla that is different from other species of Oreocharis in southwest China and, although it is morphologically similar to O. ronganensis and O. reticuliflora, it has significant differences in the colour and shape of the corolla, the apex of the corolla limb, shape and indumentum of the filaments and a shorter pistil. A detailed description, colour photographs, distribution and habitat, as well as the IUCN conservation status, are also provided.

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Research Article Tue, 28 Jun 2022 19:41:08 +0300
Fordiophyton tereticaule (Melastomataceae), a new species from China https://phytokeys.pensoft.net/article/82670/ PhytoKeys 197: 59-69

DOI: 10.3897/phytokeys.197.82670

Authors: Si-Jin Zeng, Yi-Hua Tong, Nian-He Xia

Abstract: A new species, Fordiophyton tereticaule, from China, is described and illustrated here based on morphological and molecular evidence. It is morphologically similar to F. faberi in having erect stems, slightly oblique and membranous leaf blades, broadly ovate to suborbicular bracts, and oblong petals, but differs by the terete stems, densely puberulous petioles, and elliptic leaf blades. Our phylogenetic analyses based on plastid genome and nrITS data indicate that this new species is clustered with four Fordiophyton species of Yunnan but placed far apart from F. faberi. An updated key to the genus is also provided.

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Research Article Fri, 27 May 2022 11:04:40 +0300
Primulina nana (Gesneriaceae), a new species from eastern Guangxi, China https://phytokeys.pensoft.net/article/83089/ PhytoKeys 197: 33-39

DOI: 10.3897/phytokeys.197.83089

Authors: Chi Xiong, Wei-Chuen Chou, Yi Huang, Fang Wen

Abstract: Primulina nana C.Xiong, W.C.Chou & F.Wen, a new species of Gesneriaceae from limestone areas of Guangxi, China, is described and illustrated here. It morphologically resembles P. yangshuoensis Y.G.Wei & F.Wen in papillose leaf surface, but can be easily distinguished from the latter by noting a combination of characteristics, especially in its leaf blades, leaf blade indumentum characteristic, calyx lobes, corolla and the disc. We found only one population at the type locality, about 200 mature individuals. According to the IUCN Red List Categories and Criteria (Version 3.1), the new species is provisionally assessed as Critically Endangered (CR).

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Research Article Mon, 23 May 2022 00:00:00 +0300
Viola shiweii, a new species of Viola (Violaceae) from karst forest in Guizhou, China https://phytokeys.pensoft.net/article/83176/ PhytoKeys 196: 63-89

DOI: 10.3897/phytokeys.196.83176

Authors: Xiao-Chen Li, Zheng-Wei Wang, Qi Wang, Bin-Jie Ge, Bin Chen, Ping Yu, Xin Zhong

Abstract: Viola shiweii Xiao C. Li & Z. W. Wang (Violaceae), a new species from Guizhou, China, is described, based on morphological and molecular evidence. The new species is morphologically most similar to V. kwangtungensis Melchior in its glabrous lateral petals and stoloniferous habit, but can be distinguished by its obtuse teeth along the leaf margin, its abaxially greyish-green leaf blade and its broader and entire sepals with a distinct basal appendage.

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Research Article Mon, 16 May 2022 12:12:00 +0300
Three new species of Bredia (Sonerileae, Melastomataceae) from the Sino-Vietnamese border area https://phytokeys.pensoft.net/article/83934/ PhytoKeys 195: 107-125

DOI: 10.3897/phytokeys.195.83934

Authors: Jin-Hong Dai, Shi-Yue Nong, Xi-Bin Guo, Truong Van Do, Yan Liu, Ren-Chao Zhou, Ying Liu

Abstract: Bredia bullata, B. enchengensis, and B. nitida (Sonerileae, Melastomataceae), three species occurring in Sino-Vietnamese limestone karst regions, are described as new. Molecular phylogenetic analyses and morphological divergence indicate that these species are well separated from their close relatives in Bredia, justifying their recognition as distinct species. Bredia bullata is unique in its interveinal areas prominently bullate each with an apical seta, a character otherwise never recorded in the genus. Bredia nitida resembles B. malipoensis in habit, leaf shape, and inflorescence morphology, but differs in the glabrescent and nitid adaxial leaf surface (vs. densely pubescent and subvelvety), ovate-elliptic or elliptic calyx lobes (vs. triangular to semiorbicular), and white petals (vs. purplish-red). Bredia enchengensis is closest to B. longiradiosa, but easily recognized by its prostrate habit (vs. erect), the yellowish-green, membranous and fragile leaves (vs. green or dark green, papery), and white anthers (vs. pink to purplish). These new discoveries show that further botanical exploration is warranted in the remote Sino-Vietnamese bordering region.

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Research Article Mon, 9 May 2022 21:11:36 +0300
A phylogenetic and morphological study of the Tectaria fuscipes group (Tectariaceae), with description of a new species https://phytokeys.pensoft.net/article/80452/ PhytoKeys 195: 75-92

DOI: 10.3897/phytokeys.195.80452

Authors: Shi-Yong Dong, Shu-Hang Li, Ling Huang, Shi-Shi Tan, Zheng-Yu Zuo

Abstract: The fern species Tectaria fuscipes and morphologically similar species, which are common in tropical and subtropical mainland Asia, constitute a taxonomically confusing group. To better understand species boundaries and relationships within the T. fuscipes group, we conducted phylogenetic analyses of five plastid regions and morphological observations of herbarium specimens and living plants. As a result, we produced a generally well-resolved phylogeny of the T. fuscipes group and related species in Asia. The phylogenetic analyses supported the monophyly of the T. fuscipes group, which includes T. dissecta, T. fuscipes, T. ingens, T. paradoxa, T. setulosa, T. subfuscipes, T. subsageniacea and a new species, but excludes T. kusukusensis. However, T. fuscipes, T. subfuscipes and T. subsageniacea are almost indistinguishable in morphology, which form a complex characterised by the black linear-lanceolate stipe scales. The new species found in southern China and Vietnam is described here as T. fungii. It is similar to the T. fuscipes complex and T. kusukusensis, but differs from the former mainly by its brown-castaneous lanceolate stipe scales and from the latter by having nearly hairless laminae (versus frond axes abaxially bearing copious hairs).

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Research Article Mon, 9 May 2022 17:53:21 +0300
Chimonobambusa sangzhiensis (Poaceae, Bambusoideae), a new combination supported by morphological and molecular evidence https://phytokeys.pensoft.net/article/83004/ PhytoKeys 195: 127-141

DOI: 10.3897/phytokeys.195.83004

Authors: Zheng-Yang Niu, Zhuo-Yu Cai, Chun-Lin Liao, Nian-He Xia

Abstract: This study elucidates the taxonomic position of Indosasa sangzhiensis in considering whether it belongs to Indosasa or Chimonobambusa. Based on morphological and molecular phylogenetic evidence, our results explicitly indicated that I. sangzhiensis should be a member of Chimonobambusa, rather than Indosasa, and is a distinct species closely related to C. communis, C. opienensis and C. puberula. Thus, the new combination Chimonobambusa sangzhiensis (B.M.Yang) N.H.Xia & Z.Y.Niu is made. A detailed description as well as two color plates of this species are also provided.

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Research Article Mon, 9 May 2022 11:05:27 +0300
Paracladopus chiangmaiensis (Podostemaceae), a new generic record for China and its complete plastid genome https://phytokeys.pensoft.net/article/82789/ PhytoKeys 195: 1-13

DOI: 10.3897/phytokeys.195.82789

Authors: Mingsong Wu, Kai Zhang, Xinquan Yang, Xin Qian, Rongtao Li, Jianhe Wei

Abstract: The genus Paracladopus was established based on the type species P. chiangmaiensis in 2006. The two Paracladopus species are distributed in Thailand and Laos; however, neither of them has been documented in China to date. During our field work in 2020, we collected a river-weed in Wuzhi Mountain, Hainan Province of China. After checking the morphological characters, it was identified as P. chiangmaiensis. Then, we assembled and annotated its chloroplast genome based on the genome skimming data. The results showed that the complete chloroplast genome was 133,748 bp with 35% GC content, consisting of 76 protein-coding genes, 30 tRNA genes, and 4 rRNA genes. A maximum-likelihood tree constructed based on the matk genes showed that WuMS109 was clustered with P. chiangmaiensis (AB537420, AB698348) without base difference and together with the remains of Paracladopus formed a sister clade to Cladopus. This is the first report of P. chiangmaiensis that represents a new generic record for China. The discovery of this river-weed could lay the foundation for investigating their biogeographical patterns and species evolution in further studies.

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Research Article Wed, 20 Apr 2022 10:22:00 +0300
Primula longipilosa (Primulaceae), a new species from Yunnan, China https://phytokeys.pensoft.net/article/81335/ PhytoKeys 194: 15-22

DOI: 10.3897/phytokeys.194.81335

Authors: Ze-Huan Wang, Yi Wang, Li Chen, Hua Peng, Zhi-Kun Wu, Guang Guo

Abstract: Primula longipilosa from SW Yunnan, China, is described as a species new to science and illustrated. The systematic placement of this new species is also discussed based on an nrITS molecular tree. It is morphologically most similar to P. mollis, but differs from the latter in its racemose inflorescence, green calyx tube, pink to pink rose corolla, stamens at 1/3 length above the base of the corolla tube and applanate globose capsule.

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Research Article Mon, 11 Apr 2022 09:54:42 +0300
Thorea baiyunensis sp. nov. (Thoreales, Rhodophyta) and T. okadae, a new record from China https://phytokeys.pensoft.net/article/79667/ PhytoKeys 193: 107-123

DOI: 10.3897/phytokeys.193.79667

Authors: Jinfen Han, Fangru Nan, Jia Feng, Junping Lv, Qi Liu, Xudong Liu, Shulian Xie

Abstract: The freshwater red algal order Thoreales has a triphasic life history, of which the “Chantransia” phase is a small filamentous sporophyte. The “Chantransia” stage is difficult to distinguish from species in the genus Audouinella by its morphological characteristics. In this study, five “Chantransia” isolates (GX41, GX81, GD224, GD225, GD228) were collected from Guangxi Zhuang Autonomous Region and Guangdong Province in China. Based on morphological data, all five isolates were similar to A. pygmaea, whereas sequence data from the large subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase (rbcL) gene and the 5’ region of the mitochondrial cytochrome oxidase I gene (COI-5P) determined that these specimens represented the “Chantransia” stage of two species in the genus Thorea rather than Audouinella. Phylogenetic analyses of the concatenated genes supported the proposal of a new species, T. baiyunensis, and a new geographic record of T. okadae, a species previously described only in Japan. Therefore, combined with previous records, four species of this genus are now recognized in China, including T. hispida, T. violacea, T. baiyunensis and T. okadae.

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Research Article Fri, 1 Apr 2022 10:02:56 +0300
Actinostephanus (Gesneriaceae), a new genus and species from Guangdong, South China https://phytokeys.pensoft.net/article/80715/ PhytoKeys 193: 89-106

DOI: 10.3897/phytokeys.193.80715

Authors: Fang Wen, Zi-Bing Xin, Xin Hong, Lei Cai, Xiao-Yun Chen, Jun-Jie Liang, Hui-Feng Wang, Stephen Maciejewski, Yi-Gang Wei, Long-Fei Fu

Abstract: Actinostephanus, a new genus from southern China, is described and colorfully illustrated with a single species, A. enpingensis. This new genus is morphologically most similar to Boeica and Leptoboea, nevertheless, it can be easily distinguished from the latter two by the following characteristics, such as leaves in whorls of three, all closely clustered at the top; corolla bowl-shaped, 5-lobed, actinomorphic; capsule hard, oblong-ovoid, short, 3–4 mm long, densely appressed villous, wrapped by persistent densely pubescent calyx lobes, style persistent. The new genus and related genera were sequenced using the next-generation sequencing technique. The whole plastid genome of the new genus is 154, 315 – 154, 344 bp in length. We reconstructed phylogenetic trees using the dataset of 80 encoded protein genes of the whole plastid genome from 47 accessions based on ML and BI analyses. The result revealed that the new genus was recovering in a polytomy including Boeica, Rhynchotechum, and Leptoboea with strong support, congruent to the morphological evidence. A global conservation assessment was also performed and classifies A. enpingensis as Least Concern (LC). In addition, after a review of recently described species of Gesneriaceae, we propose that plant enthusiasts, especially Gesneriad fans, have been playing an increasingly important role in the process of new taxa-discoveries.

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Research Article Tue, 22 Mar 2022 16:42:21 +0200
Elsholtzia zhongyangii (Lamiaceae), a new species from Sichuan, China https://phytokeys.pensoft.net/article/80327/ PhytoKeys 193: 77-88

DOI: 10.3897/phytokeys.193.80327

Authors: Xin-Jie Jin, Yue Huang, Yu-Kun Wei, Qing Ma, Lu-Xian Liu, Zhi-Xi Fu, Gui-Fang Wu, Yong-Hua Zhang, Pan Li

Abstract: Elsholtzia zhongyangii (Lamiaceae), a new species from Sichuan Province, China, is described and illustrated. The new species is morphologically similar to E. feddei f. feddei, but it can be easily distinguished from E. feddei f. feddei by smaller corolla (3.2–3.5 mm vs. 4.5–5.3 mm), bract indumentum (glabrous, except margin ciliate vs. villous, especially on veins abaxially, glabrous adaxially) and bract stalked (ca. 1.2 mm vs. sessile). Phylogenetic analyses, based on two nuclear ribosomal (ETS, ITS) and five plastid (rbcL, matK, trnL-F, ycf1, ycf1-rps15) regions, confirmed that the new species formed a monophyletic clade with robust support. The new species is currently known from western Sichuan.

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Research Article Tue, 22 Mar 2022 09:42:51 +0200
Leaf epidermal micromorphology of Zingiber (Zingiberaceae) from China and its systematic significance https://phytokeys.pensoft.net/article/77526/ PhytoKeys 190: 131-146

DOI: 10.3897/phytokeys.190.77526

Authors: Hui Zhao, Mei-Hua Xiao, Yan Zhong, Ying-Qiang Wang

Abstract: Leaf epidermal characteristics are important for phylogenetic and taxonomic studies of many plants, but there is currently insufficient such data for this application in Zingiber species. Therefore, the leaf epidermal micromorphology of 22 species in three sections of Zingiber was investigated by light microscopy and scanning electron microscopy. Differences between various taxonomic groups of Zingiberaceae were also compared to assess their phylogenetic and taxonomic significance. As in other genera of Zingiberaceae, the epidermal cells in both the adaxial and abaxial epidermis of Zingiber species were found to be hexagonal or polygonal, with non-sinuous anticlinal walls that are arranged parallel to leaf veins. Tetracytic stomata are mostly randomly distributed in the intercostal regions of both surfaces and are more common on the abaxial surface. The stomatal density of the species in sect. Pleuranthesis is significantly lower than that in sects. Zingiber and Cryptanthium. There are two types of trichome in Zingiber: so-called “delicate” trichomes are present in most species, while “stout” trichomes with a swollen base are only found in Z. corallinum and Z. montanum. Oil cells occur in both epidermal layers of some species in sects. Zingiber and Cryptanthium, but only in the abaxial epidermis of Z. ellipticum in sect. Pleuranthesis. Crystals are found in the abaxial epidermis only in all species, but are present in both epidermal layers of Z. corallinum and Z. montanum. Although the epidermal morphology is similar in most Zingiber species, stomatal density, type of trichome and distribution of oil cells and crystals offer valuable information for the systematic and taxonomic studies in this genus.

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Research Article Mon, 28 Feb 2022 09:54:42 +0200
Nomenclature and taxonomic identities of Prunus zappeyana and P. zappeyana var. subsimplex (Rosaceae) https://phytokeys.pensoft.net/article/80490/ PhytoKeys 190: 47-51

DOI: 10.3897/phytokeys.190.80490

Authors: Bao-Huan Wu, Da-Fang Cui, Ming Kang

Abstract: The original specimens of both Prunus zappeyana and P. zappeyana var. subsimplex were found to belong to more than one taxon. In addition, P. zappeyana var. subsimplex was found to be invalid because, when the name was published, two separate descriptions were given to two cited collections, but not to the taxon, making the name unaccompanied with a description or diagnosis of this taxon (Art. 38.1 (a)). Therefore, a lectotype of P. zappeyana was designated under Art. 9.11 of ICN, by which P. zappeyana was placed in the synonymy of P. veitchii.

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Short Communication Thu, 17 Feb 2022 11:11:26 +0200
Goodyera medogensis (Orchidaceae), a new species from Tibet, China https://phytokeys.pensoft.net/article/77374/ PhytoKeys 189: 141-154

DOI: 10.3897/phytokeys.189.77374

Authors: Yi-Hua Tong, Mei Sun, Bing-Mou Wang, Huai-Zhen Tian

Abstract: A new species of Goodyera (Orchidaceae) from Tibet, China, G. medogensis, is described and illustrated here. Molecular phylogenetic results based on one nuclear (ITS) and two plastid markers (matK and trnL-F) support the recognition of G. medogensis as a new species in Goodyera subsection Reticulum. Morphologically, the novelty is most similar to G. biflora, G. vittata and especially to G. hemsleyana, but differs by the thick grid lines of the reticulations with a diffused margin on the adaxial surface of the leaf blades, the inflorescence with more flowers, the obliquely obovate-rhombic petals, the yellow or yellowish labellum without a lamella on the blade, and the shorter trichomes on the floral bracts, sepals and ovary. Finally, a key to the species of Goodyera subsect. Reticulum in China is also provided.

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Research Article Mon, 14 Feb 2022 18:55:56 +0200
Primulina silaniae sp. nov. (Gesneriaceae) from the limestone area of Guizhou Province, China https://phytokeys.pensoft.net/article/72099/ PhytoKeys 185: 123-130

DOI: 10.3897/phytokeys.185.72099

Authors: Jin-Quan Zhang, Hong Huang, Mei-Jun Li, Mei Huang, Quan-Yuan Li, Yu-Lu Zhou, Yi Chen, Fang Wen, Xin-Xiang Bai

Abstract: Primulina silaniae X.X.Bai & F.Wen, a new species of Primulina Hance (Gesneriaceae) from the limestone area of Wangmo County, Guizhou Province, is described and illustrated. The new species is similar to P. spiradiclioides Z.B.Xin & F.Wen, but can be easily distinguished from the latter by a combination of characteristics, especially in the lateral veins of its leaf and floral shape and tube. At present, three populations in one locality of this new taxon were found, totaling about 600 mature individuals. According to the IUCN Red List Categories and Criteria (Version 3.1), the species is provisionally assessed as Vulnerable [VU D1].

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Research Article Fri, 26 Nov 2021 16:14:25 +0200
Lespedeza danxiaensis (Fabaceae), a new species from Guangdong, China, based on molecular and morphological data https://phytokeys.pensoft.net/article/72788/ PhytoKeys 185: 43-53

DOI: 10.3897/phytokeys.185.72788

Authors: Wan-Yi Zhao, Kai-Wen Jiang, Zai-Xiong Chen, Bin Tian, Qiang Fan

Abstract: Lespedeza danxiaensis (Fabaceae), a new species from Danxiashan National Nature Reserve in Guangdong Province, is described and illustrated. The new species is morphologically similar to Lespedeza pilosa, but it can be easily distinguished by its thin leathery leaflets and long peduncles. Phylogenetic analysis based on ITS confirmed that the new species belongs to Lespedeza subg. Macrolespedeza. The new species is the first known species of Lespedeza endemic to Danxia landform and is currently only known from Mount Danxia, Guangdong.

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Research Article Mon, 15 Nov 2021 09:13:00 +0200
Dryopteris wulingshanensis (Dryopteridaceae), a new species from Hunan, China https://phytokeys.pensoft.net/article/72019/ PhytoKeys 185: 17-26

DOI: 10.3897/phytokeys.185.72019

Authors: Jiang-Ping Shu, Zi-Yue Liu, Zhi-Rong Gu, Li-Jun Chen, Hong-Jin Wei, Xi-Le Zhou, Yue-Hong Yan, Rui-Jiang Wang

Abstract: Dryopteris wulingshanensis, a new species growing on limestone in the Wulingshan Mountains, Hunan, China, is described and illustrated. This species is most similar to D. jishouensis and D. gymnophylla on general morphological traits, such as the form of scales, rhizome and sori, but differs by the number of vascular bundles at the base of the petiole, length to width ratio of lamina, stalk length of basal pinnae, division of the lamina, apex form of the pinnule and habitat. Moreover, molecular phylogenetic analysis using the chloroplast rbcL gene suggested that D. wulingshanensis, as the sister group of D. jishouensis, is a monophyletic clade. According to its restricted geographic range, small populations and few individuals, D. wulingshanensis should be considered endangered, according to the IUCN Red List criteria.

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Research Article Wed, 10 Nov 2021 13:05:27 +0200
Haplodontium altunense (Bryaceae, Bryopsida), a new moss species from Northwest China https://phytokeys.pensoft.net/article/71642/ PhytoKeys 183: 9-19

DOI: 10.3897/phytokeys.183.71642

Authors: Xiao-Rui Wang, Min Li, John R. Spence, Jian-Cheng Zhao, Sulayman Mamtimin

Abstract: Haplodontium altunense X.R.Wang & S.Mamtimin, a new moss species of the family Bryaceae from Xinjiang Uygur Autonomous Region, China is described and illustrated. Genetic analysis based on ITS sequences shows that this species is a member of the Bryaceae and in the same clade as Anomobryum. Particularly distinctive features of the new species include: double peristome; the exostome has raised and membranous chomata with united lamellae between two teeth proximally; the endostome is poorly developed and all the endostomial material tightly adherent to the exostome.

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Research Article Fri, 8 Oct 2021 08:00:02 +0300
Begonia pseudoedulis, a new species in Begonia sect. Platycentrum (Begoniaceae) from southern Guangxi of China https://phytokeys.pensoft.net/article/69074/ PhytoKeys 182: 113-124

DOI: 10.3897/phytokeys.182.69074

Authors: Xin-Xin Feng, Yan Xiao, Zhi-Xian Liu, Ren-Kun Li, Dan Wei, Dai-Ke Tian

Abstract: Begonia pseudoedulis, a new species in Begonia sect. Platycentrum (Klotzsch) A.DC. (Begoniaceae) from southern Guangxi of China, is here described and illustrated. It morphologically resembles B. edulis H.Lév. and B. dielsiana E.Pritz. ex Diels but differs easily by its hairy petioles and inflorescences, and red hispidulous flower tepals, ovary and capsules. The molecular phylogenetic analysis based on ITS supported that the new species was a monophyletic lineage, separating from both B. dielsiana and B. edulis. Due to its isolated distribution with several small populations, which are possibly disturbed by human activities, the species is considered as “Near Threatened” (NT) according to the IUCN Red List Categories and Criteria.

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Research Article Fri, 1 Oct 2021 08:00:02 +0300
Vaccinium motuoense (Ericaceae), a new species from Xizang, China https://phytokeys.pensoft.net/article/71522/ PhytoKeys 181: 105-111

DOI: 10.3897/phytokeys.181.71522

Authors: Yi-Hua Tong, Wang-Lin Zhao, Bing-Mou Wang, En-De Liu, Jie Cai, Yong-Jie Guo

Abstract: Vaccinium motuoense (Ericaceae), a new species from Motuo County, Xizang Autonomous Region, China is described and illustrated. This new species belongs to Vaccinium sect. Calcicolus and is morphologically most similar to V. dunalianum, but differs in having yellowish-brown tomentose young branches, petioles and inflorescence rachis, leaf blades with 2–3(–4) pairs of secondary veins, usually all basal and with fine veins impressed adaxially and urceolate to spherical corollas.

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Research Article Fri, 10 Sep 2021 12:28:24 +0300
Pseudostellaria wuyishanensis, a new species of Caryophyllaceae from Fujian, China https://phytokeys.pensoft.net/article/67436/ PhytoKeys 181: 21-28

DOI: 10.3897/phytokeys.181.67436

Authors: Xiao Luo, Qi-Yi Yang, Zhe Zhang, Pan Zhu, Liang Ma, Xin-Yan Chen, Shu-Yi Lin, Shi-Pin Chen

Abstract: Pseudostellaria wuyishanensis, a new species from the Wuyishan National Park, Fujian, China, is described and illustrated. Morphologically, Pseudostellaria wuyishanensis resembles P. heterantha. However, the new species can be distinguished by presence of stolons, 1 line of hairs on the stem, smaller leaf blades, shorter pedicels, and ovary with 2 styles.

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Research Article Wed, 25 Aug 2021 10:44:48 +0300
Agapetes heana, a new species of A. ser. Longifiles (Ericaceae) from Yunnan, China https://phytokeys.pensoft.net/article/69667/ PhytoKeys 180: 133-139

DOI: 10.3897/phytokeys.180.69667

Authors: Yi-Hua Tong, Ying Bai, Jian-Ming Feng, Ji-Dong Ya

Abstract: Agapetes heana Y. H. Tong & J. D. Ya (Ericaceae), a new species from Lüchun Xian, Yunnan Province, China is described and illustrated. This new species is assigned to Agapetes sect. Agapetes ser. Longifiles Airy Shaw. It is closest to A. inopinata Airy Shaw and A. oblonga Craib, but differs in having bead-like tubers, leaf blade with a wholly serrulate margin, subulate and much longer calyx lobes, much larger corollas that are carmine, green at the apex and maroon on angles, and longer stamens without spurs on the back.

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Research Article Mon, 9 Aug 2021 12:35:48 +0300
Aphyllorchis yachangensis (Orchidaceae), a new holomycotrophic orchid from China https://phytokeys.pensoft.net/article/63994/ PhytoKeys 179: 91-97

DOI: 10.3897/phytokeys.179.63994

Authors: Ying Qin, Hailing Chen, Zhenhai Deng, Yan Liu

Abstract: Aphyllorchis yachangensis, a new holomycotrophic orchid from Guangxi, southern China is described and illustrated here. This new species is similar to A. caudata but differs from the latter mainly by the sepals acute at the apex, the hypochile with 2 smaller and semicircular wings, the epichile adaxially smooth, acute, the lateral lobes triangular-ovate and the column clavate.

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Research Article Mon, 5 Jul 2021 08:57:02 +0300
Taxonomic revision of Sageretia (Rhamnaceae) from China I: identities of S. lucida, S. thea var. cordiformis and S. yunlongensis, with the description of a new species S. ellipsoidea https://phytokeys.pensoft.net/article/64750/ PhytoKeys 179: 13-28

DOI: 10.3897/phytokeys.179.64750

Authors: Yi Yang, Hua Peng, Hang Sun

Abstract: A taxonomic revision of Sageretia lucida, S. thea var. cordiformis and S. yunlongensis in China is presented. Sageretia lucida is revised in terms of morphological characters (habit, branchlet color, phyllotaxis and rachis length), distribution, habitat, and phenology; S. thea var. cordiformis is raised to S. cordiformis; and S. yunlongensis is excluded from the genus Sageretia and reduced to the synonym of Rhamnus nigricans. Furthermore, a new species, S. ellipsoidea, is erected based on the paratype collections of S. lucida. The new species morphologically differs from S. lucida in having reddish brown branchlets, opposite or subopposite phyllotaxis, shorter rachises, and flowering in spring or early summer. S. ellipsoidea is factually closest to S. hamosa as they share similar woody-vine habit and larger fruit size, and fruiting in winter, whereas the former can be easily recognized based on its smaller leaf blades, fewer lateral veins, shorter rachises, and ellipsoidal or elliptic-ovoid fruits.

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Research Article Thu, 17 Jun 2021 10:19:06 +0300
Artabotrys pachypetalus (Annonaceae), a new species from China https://phytokeys.pensoft.net/article/64485/ PhytoKeys 178: 71-80

DOI: 10.3897/phytokeys.178.64485

Authors: Bine Xue, Gang-Tao Wang, Xin-Xin Zhou, Yi Huang, Yi Tong, Yongquan Li, Junhao Chen

Abstract: Artabotrys pachypetalus sp. nov. is described from Guangdong, Guangxi, Guizhou, Hunan and Jiangxi in China. A detailed description, distribution data, along with a color plate and a line drawing are provided. In China, specimens representing this species were formerly misidentified as A. multiflorus or A. hongkongensis (= A. blumei). Artabotrys blumei typically has a single flower per inflorescence, whereas both Artabotrys pachypetalus and A. multiflorus have multiple flowers per inflorescence. In addition, A. pachypetalus is readily distinguished from A. multiflorus in having thicker and shorter petals, and connivent and somewhat trigonal or terete inner petal blades. Artabotrys pachypetalus is most similar to A. punctulatus because both have multi-flowered inflorescences and similar petal length, but A. pachypetalus differs in having cream petals in vivo, connivent inner petal blades, and a short, raised rim above the inner petal claw. Artabotrys multiflorus should be excluded from the flora of China because none of the Chinese specimens of Artabotrys collected so far fall within the variation of A. multiflorus.

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Research Article Thu, 27 May 2021 09:28:37 +0300
Primulina papillosa (Gesneriaceae), a new species from limestone areas of Guangxi, China https://phytokeys.pensoft.net/article/63878/ PhytoKeys 177: 55-61

DOI: 10.3897/phytokeys.177.63878

Authors: Zi-Bing Xin, Wei-Chuen Chou, Stephen Maciejewski, Long-Fei Fu, Fang Wen

Abstract: Primulina papillosa Z.B. Xin, W.C. Chou & F. Wen, a new species from limestone areas of Guangxi, China, is described and illustrated here. It morphologically resembles P. linearifolia (W.T. Wang) Yin Z. Wang and P. pseudolinearifolia W.B. Xu & K.F. Chung, but can be easily distinguished by some combined characters, especially its leaf blades densely papillose-hispid. We found only one population at the type locality with no more than 200 individuals, so that this new species is provisionally assessed as Critically Endangered (CR) using IUCN Criteria.

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Research Article Wed, 12 May 2021 11:03:39 +0300
Utricularia lihengiae (Lentibulariaceae), a new species from Northwest Yunnan, China https://phytokeys.pensoft.net/article/63346/ PhytoKeys 177: 17-24

DOI: 10.3897/phytokeys.177.63346

Authors: Zhuo Cheng, Qiong Fang, Fei Wang, Chun-Lin Long

Abstract: Utricularia lihengiae, a new species from the Dulongjiang region of northwest Yunnan, China, is here described and illustrated. The new species belongs to the section Oligocista and is similar to U. bifida L. and U. scandens Benj., from which it can be easily distinguished by the dark purple stripe on the corolla. The new species also differs in its shorter inflorescence and the shape of the calyx lobes.

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Research Article Mon, 26 Apr 2021 11:03:36 +0300
Tigridiopalma exalata, a new and endangered species of Melastomataceae from China https://phytokeys.pensoft.net/article/63619/ PhytoKeys 176: 33-42

DOI: 10.3897/phytokeys.176.63619

Authors: Si-Jin Zeng, Ye-Chun Xu, Gang-Tao Wang, Peng Jia, Da-Fang Cui

Abstract: A new species of the genus Tigridiopalma, formerly considered monotypic, is here described as T. exalata and illustrated based on molecular and morphological evidence. It is morphologically similar to T. magnifica in having a short stem, huge basal leaves, scorpioid cymes, and 5-merous flowers, but differs in having ribbed and pale yellow puberulent petioles, purple petals with a small white apical patch, connectives of longer stamens with a distinct dorsal short spur at their base, and wingless capsules. Due to the restricted distribution, small populations and horticultural potential of this new species, it should be categorized as an Endangered species (EN).

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Research Article Fri, 16 Apr 2021 10:41:32 +0300
A new synonym of Polygonatum in China, based on morphological and molecular evidence https://phytokeys.pensoft.net/article/63383/ PhytoKeys 175: 137-149

DOI: 10.3897/phytokeys.175.63383

Authors: Maoqin Xia, Ying Liu, Jingjing Liu, Donghong Chen, Yan Shi, Zhicong Bai, Yu Xiao, Chen Peng, Jinping Si, Pan Li, Yingxiong Qiu

Abstract: Polygonatum kingianum Collett et Hemsl. var. grandifolium D.M. Liu & W.Z. Zeng (1981), which sprouts twice a year, once in spring and once in autumn, differs from Polygonatum kingianum in leaves, bracts, perianth and filaments. Morphological comparison and molecular phylogeny indicate that it is identical to the newly-published Polygonatum hunanense H.H. Liu & B.Z. Wang (2021). Hence, we propose that P. kingianum var. grandifolium should be recognised as a new synonym of P. hunanense. In addition, phylogenetic analyses confirmed that P. hunanense is sister to Polygonatum sect. Polygonatum, rather than P. kingianum of Polygonatum sect. Verticillata.

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Research Article Mon, 12 Apr 2021 14:01:42 +0300
Flueggea acicularis (Phyllanthaceae), a narrow endemic species rediscovered in central China https://phytokeys.pensoft.net/article/57217/ PhytoKeys 172: 57-66

DOI: 10.3897/phytokeys.172.57217

Authors: Songzhi Xu, Qiliang Gan, Lianzhong Fu, Mingxi Jiang, Zhenyu Li

Abstract: Flueggea acicularis (Phyllanthaceae) is endemic to the karst region of central China. Male specimens of this species were first collected in 1908. In 1989, female plants of F. acicularis were found for the first time, but misidentified as a new species. Throughout this period the male plants of F. acicularis were mismatched with female plants of other species, and male plants had not been collected since 1908. Then, in March, 2009, the authors rediscovered a wild population of F. acicularis consisting of both male and female plants in Wuxi county, Chongqing municipality, China. Based on field investigation and examination of specimens, we matched the correct female and male plants of this species for the first time since its initial publication a century ago. A complete and accurate morphological description, distribution, habitat and phenology of this species are also provided. Furthermore, the conservation status of F. acicularis is assessed as “Near Threatened” (NT) according to the IUCN Red List criteria.

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Research Article Wed, 10 Feb 2021 11:37:09 +0200
Gigantochloa glabrata (Poaceae, Bambusoideae), a new bamboo species from Yunnan, China https://phytokeys.pensoft.net/article/59562/ PhytoKeys 171: 37-45

DOI: 10.3897/phytokeys.171.59562

Authors: Zu-Chang Xu, Jing-Xia Liu, De-Zhu Li

Abstract: Gigantochloa glabrata N. H. Xia & Y. Zeng ex D. Z. Li & Z. C. Xu, sp. nov., a new species of paleotropical woody bamboo has been described and illustrated from Yunnan, China. The new species is morphologically similar to G. albociliata and G. levis, but differs from them by having erect culm sheath blades; culm sheath ligules 4–6 mm high, truncate, denticulate; and with a ring of white tomentum on the intranode and below the node. The new species was mistakenly identified as Gigantochloa albociliata in the Flora of China and was recognised with description of the vegetative characters in 2014, but it was not effectively published. Here, we designate a complete specimen with inflorescence as the type and describe it in accordance with the Code.

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Research Article Thu, 7 Jan 2021 10:13:25 +0200
Morphology and molecules support the new monotypic genus Fenghwaia (Rhamnaceae) from south China https://phytokeys.pensoft.net/article/57277/ PhytoKeys 171: 25-35

DOI: 10.3897/phytokeys.171.57277

Authors: Gang-Tao Wang, Jiang-Ping Shu, Guo-Bin Jiang, Yu-Qiang Chen, Rui-Jiang Wang

Abstract: Fenghwaia, a new monotypic genus, along with the new species Fenghwaia gardeniicarpa, is described from Guangdong Province, China. The combined features of inferior ovary, cylindrical drupaceous fruits and orbicular and dorsiventrally-compressed seeds with an elongate and pronounced basal appendage make the new genus significantly different from other genera of the family. In addition, its pollen morphology also showed great similarity to other species of this stenopalynous family. The molecular phylogenetic analysis, based on nuclear ribosomal internal transcribed spacer (ITS) and plastid trnL-F intron spacer (trnL-F) DNA sequence data from the new genus and the other 375 species representing 58 genera of Rhamnaceae, indicates that Fenghwaia is nested within the ‘rhamnoid’ group and sister to the tribe Rhamneae and then both sister to the tribe Maesopsideae. A taxonomic classification key to the ‘rhamnoid’ group is provided, based on morphological characters. A global conservation assessment is also performed and classifies Fenghwaia gardeniicarpa as Near Threatened (NT).

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Research Article Wed, 6 Jan 2021 10:37:31 +0200
Two new species of Fargesia (Poaceae, Bambusoideae) from southwestern China https://phytokeys.pensoft.net/article/58780/ PhytoKeys 170: 25-37

DOI: 10.3897/phytokeys.170.58780

Authors: Xia-Ying Ye, Yu-Xiao Zhang, De-Zhu Li

Abstract: Two new species of Fargesia, one from Xizang (Tibet) and one from Yunnan, China, are described and illustrated. Fargesia viridis D.Z. Li & X.Y. Ye is characterized by its densely white powder, nearly solid internodes, yellow setose sheath scar and culm sheaths, and 4–6 leaves of large size. Fargesia purpurea D.Z. Li & X.Y. Ye has thinner culms (0.5–1.4 cm in diameter), a ring of 4–5 mm tall brown setae below nodes, fewer branches, glabrous sheath scar and culm sheaths, differentiated from the related species.

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Research Article Thu, 10 Dec 2020 10:04:25 +0200
Primulina jiuyishanica (Gesneriaceae), a new species from Hunan, China https://phytokeys.pensoft.net/article/53763/ PhytoKeys 162: 37-44

DOI: 10.3897/phytokeys.162.53763

Authors: Kun Liu, De-Chang Meng, Zhang-Jie Huang, Stephen Maciejewski, Zi-Bing Xin

Abstract: Primulina jiuyishanica K. Liu, D.C. Meng & Z.B. Xin, a new species of Gesneriaceae from Hunan, China, is described and illustrated. The new species is morphologically similar to Primulina fimbrisepala (Hand.-Mazz.) Yin Z. Wang, but differs in its elliptic to broadly elliptic leaf blade with broadly cuneate base, peduncle densely pubescent with sparse glandular hairs, corolla throat with no purple spots inside, the yellow patch in the throat densely glandular-pubescent and pistil densely glandular-pubescent. Photographs and descriptions of the new species are provided below.

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Research Article Wed, 7 Oct 2020 14:28:11 +0300
New combinations and synonyms in Rehderodendron (Styracaceae) https://phytokeys.pensoft.net/article/54970/ PhytoKeys 161: 79-88

DOI: 10.3897/phytokeys.161.54970

Authors: Wan-Yi Zhao, Peter W. Fritsch, Zhong-Cheng Liu, Qiang Fan, Jian-Hua Jin, Wen-Bo Liao

Abstract: We demonstrate with morphological characters that the species Pterostyrax burmanicus W.W.Sm. & Farrer and Parastyrax macrophyllus C.Y.Wu & K.M.Feng (Styracaceae) are best placed in the genus Rehderodendron Hu. Rehderodendron burmanicum (W.W.Sm. & Farrer) W.Y.Zhao, P.W.Fritsch & W.B.Liao, comb. nov. and Rehderodendron macrophyllum (C.Y.Wu & K.M.Feng) W.Y.Zhao, P.W.Fritsch & W.B.Liao, comb. nov., are created. We also provide a lectotype for R. macrophyllum. These revisions result in the reduction of Pterostyrax Siebold & Zucc. to three species and this genus is no longer considered to be documented from Myanmar. Further, Parastyrax W.W.Sm. becomes a monotypic genus comprising only P. lacei (W.W.Sm.) W.W.Sm., distributed in Kachin State, northeast Myanmar and Yunnan Province, south-western China.

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Research Article Fri, 25 Sep 2020 14:43:00 +0300