Latest Articles from PhytoKeys Latest 100 Articles from PhytoKeys https://phytokeys.pensoft.net/ Thu, 28 Mar 2024 21:40:16 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ An account of the genus Cistanche (Orobanchaceae) in Iraq and taxonomic considerations in the Middle East https://phytokeys.pensoft.net/article/116470/ PhytoKeys 238: 281-294

DOI: 10.3897/phytokeys.238.116470

Authors: Majed Aldughayman, Chris J. Thorogood, Abdulridha A. A. Al-Mayah, Julie A. Hawkins

Abstract: Species limits in the genus Cistanche are poorly understood, despite the plants’ long history of use in traditional herbal medicine and food across their range. Here we present a taxonomic account for the genus Cistanche in Iraq, where several taxa have been reported, most of them doubtfully. Using herbarium specimens, images of living material, and taxonomic literature, we found evidence of only one species occurring with certainty in Iraq: Cistanche tubulosa. We found no evidence for the occurrence of other Cistanche species in Iraq, including a putative new entity reported for the region. Our work highlights inconsistencies in the literature, and underscores the importance of examining multiple stable characters for delimiting species in the genus Cistanche.

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Research Article Wed, 28 Feb 2024 17:00:24 +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
A new species of Veronica (Plantaginaceae) from Western Iran https://phytokeys.pensoft.net/article/115003/ PhytoKeys 237: 219-230

DOI: 10.3897/phytokeys.237.115003

Authors: Mahfouz Advay, Dirk C. Albach, Moslem Doostmohammadi

Abstract: A new species, Veronica kurdistanica (Plantaginaceae), is described and illustrated. It grows on limestone cliffs in mountainous alpine areas of western Iran (Kurdistan province). The new species belongs to the species group of V. kurdica and is considered to be closely related to V. daranica, V. khorassanica and V. kurdica, with which the new species is compared. Molecular phylogenetic analysis of nrDNA (ITS) region confirms this relationship. Veronica kurdistanica is distinguished from the mentioned species by its glandular indumentum, length and shape of leaves and bracts, number of flowers per raceme, length and width of calyx and corolla, and size of capsules and seeds.

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Research Article Mon, 29 Jan 2024 18:02:17 +0200
Isodon xiaoluzhiensis (Lamiaceae, Nepetoideae), a new species from Yunnan, southwest China https://phytokeys.pensoft.net/article/117071/ PhytoKeys 237: 191-200

DOI: 10.3897/phytokeys.237.117071

Authors: Shi-Gang Li, Qiang-Chun Huang, Shao-Yun Liu, Chun-Lei Xiang, Huan-Chong Wang

Abstract: Isodon xiaoluzhiensis, a new species of the tribe Ocimeae in family Lamiaceae, is described and illustrated. The new species is known only from the type locality, Xiaoluzhi village in Luzhijang dry-hot valley of Yimen County, central Yunnan, southwest China. It is characterized by having a procumbent habit, gracile stems and branches, relatively small leaves and flowers, and the phenology of flowering in winter. The morphological comparisons with its putative closest relatives (I. adenanthus and I. hsiwenii) are also presented.

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Research Article Wed, 24 Jan 2024 18:23:42 +0200
Cyrtandra obliquifolia (Gesneriaceae), a new species from Kaua‘i, Hawaiian Islands https://phytokeys.pensoft.net/article/114704/ PhytoKeys 237: 141-151

DOI: 10.3897/phytokeys.237.114704

Authors: Kenneth R. Wood, Warren L. Wagner

Abstract: Cyrtandra obliquifolia K.R. Wood & W.L. Wagner (Gesneriaceae), a new shrub species known only from Kaua‘i, Hawaiian Islands, is described and illustrated with notes on its distribution, ecology, and conservation status. The new species is morphologically most similar to Cyrtandra wawrae C.B. Clarke but differs by its unique combination of oblique, non-peltate, auriculate leaf bases, more deeply divided calyx lobes, inflorescence with fewer flowers and lacking profusely umbellate cymes. Cyrtandra obliquifolia is known from only two localities which have undergone severe habitat degradation from landslides and invasive plants and animals and is determined to be Critically Endangered (CR) when evaluated under IUCN criteria.

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Research Article Mon, 22 Jan 2024 10:28:55 +0200
Molecular and morphological evidence for a new species of Stachys (Lamiaceae) from Hunan, China https://phytokeys.pensoft.net/article/112741/ PhytoKeys 236: 121-134

DOI: 10.3897/phytokeys.236.112741

Authors: Ling Xue, Jia-Hua Cai, Min Zhan, Xiao-Ping Li, Lei Wu, Ya-Ping Chen

Abstract: Stachys yingzuijieensis, a new species from western Hunan, China, is described and illustrated. Molecular phylogenetic analyses based on three nuclear ribosomal DNA loci (ETS, ITS and 5S-NTS) recovered S. yingzuijieensis within the Stachys clade and as a sister group of S. arrecta. The two species can be easily distinguished by the morphology of lamina, corolla and nutlet. A key to all species of Stachydeae from China is also provided.

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Research Article Wed, 13 Dec 2023 15:40:01 +0200
A taxonomic revision of Thai Fernandoa Welw. ex Seem. (Bignoniaceae) https://phytokeys.pensoft.net/article/112839/ PhytoKeys 235: 249-270

DOI: 10.3897/phytokeys.235.112839

Authors: Chatchai Ngernsaengsaruay, Nattanon Meeprom, Weereesa Boonthasak, Yanatshara Attasook, Raweewan Thunthawanich

Abstract: A taxonomic revision of Fernandoa Welw. ex Seem. (Bignoniaceae) in Thailand is presented. Two species, F. adenophylla (Wall. ex G. Don) Steenis and F. collignonii (Dop) Steenis, are enumerated with updated morphological descriptions, illustrations and a taxonomic identification key, together with notes on distributions, distribution maps, habitats and ecology, phenology, conservation assessments, etymology, vernacular names, uses, and specimens examined. The collection of Wallich Cat. 6502A from Myanmar, Ava at G [G00133642] is designated here as the lectotype of F. adenophylla in a second step lectotypification. F. collignonii has a conservation status of Endangered [EN]. The leaf, stem, and wood anatomy and pollen morphology of F. adenophylla are also reported in this study.

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Research Article Wed, 22 Nov 2023 16:11:53 +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
Pollen morphology of Clerodendrum L. (Lamiaceae) from China and its systematic implications https://phytokeys.pensoft.net/article/111516/ PhytoKeys 235: 53-68

DOI: 10.3897/phytokeys.235.111516

Authors: Xiakai Huang, Rui Wu, Zheng Xiong, Zhonghui Ma

Abstract: Pollen morphology of 26 taxa of Clerodendrum, as well as one species of Volkameria from China, was investigated through a scanning electron microscope (SEM). Pollen grains of Clerodendrum are monads, radiosymmetric and tricolpate, with medium or large size. The equatorial view of the pollen grains is spheroidal or subprolate and the polar view is (sub) circular or rounded triangular. The colpus membrane of the investigated taxa is sunken (rarely even). Five varying pollen types are delimited on the basis of exine sculpturing: (1) spine-tectum perforatum; (2) spine-tectum imperforatum; (3) microspine-tectum perforatum; (4) microspine-tectum imperforatum; and (5) obtuser spine. The results indicate that Clerodendrum is closely related to several genera in Lamiaceae, including Aegiphila, Amasonia, Kalaharia, Tetraclea, Volkameria, Oxera, Faradaya, and Hosea, as supported by previous phylogenic studies. Additionally, the conventional infrageneric classification of Clerodendrum based on inflorescence and leaf characters is not supported by the results. However, the palynological data can be used to identify some closely related species with similar external characteristics. In conclusion, the investigation of pollen morphology not only contributes novel data from palynology for Clerodendrum but also provides a basis for future comprehensive classification of this genus.

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Research Article Fri, 10 Nov 2023 18:57:05 +0200
Gesneria tuberifera (Gesneriaceae), a new lithophytic species from the Sierra de Bahoruco, Barahona Peninsula of southern Hispaniola (Dominican Republic) https://phytokeys.pensoft.net/article/110476/ PhytoKeys 235: 43-52

DOI: 10.3897/phytokeys.235.110476

Authors: John L. Clark, Teodoro Clase

Abstract: A narrowly endemic new species of Gesneria is described from the Sierra de Bahoruco in the Dominican Republic’s Barahona Peninsula of southern Hispaniola. Gesneria tuberifera J.L.Clark & T.Clase, sp. nov. differs from all other congeners by the presence of a tuber and tubular red corollas with yellow lobes. Images and a discussion are provided to summarize the presence of tubers in other Gesneriaceae and differentiate Gesneria tuberifera from congeners that share a lithophytic habit. Based on IUCN guidelines, a preliminary conservation status of Endangered (EN) is assessed for G. tuberifera.

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Research Article Fri, 10 Nov 2023 10:34:11 +0200
Paraboea zunyiensis (Gesneriaceae), a new species from north Guizhou, China https://phytokeys.pensoft.net/article/111412/ PhytoKeys 235: 21-29

DOI: 10.3897/phytokeys.235.111412

Authors: Tan Deng, Fang Wen, Da-Jun Xie, Ruo-Xun Wei, Lin He, Quan-Li Dou, Zheng-Min Qian, Ren-Bo Zhang

Abstract: A new lithophytic species, Paraboea zunyiensis T.Deng, F.Wen & R.B.Zhang (Gesneriaceae), inhabiting Karst rocks in northern Guizhou, China, is introduced and depicted in this study. It bears a resemblance to P. crassifolia (Hemsl.) B.L. Burtt, yet is distinguishable by its shorter filaments and staminodes, triangular ovate calyx segments, and ovaries surpassing the styles in length. Moreover, the phylogenetic tree constructed from nuclear DNA (ITS) and plastid DNA (trnL-F) data firmly support the differentiation of this novel species from P. crassifolia.

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Research Article Mon, 6 Nov 2023 18:02:27 +0200
New species of Asclepias (Apocynaceae), Baphia (Leguminosae), Cochlospermum (Bixaceae) and Endostemon (Lamiaceae) from the Kalahari sands of Angola and NW Zambia, with one new combination in Vangueria (Rubiaceae) https://phytokeys.pensoft.net/article/110110/ PhytoKeys 232: 145-166

DOI: 10.3897/phytokeys.232.110110

Authors: David J. Goyder, Nina Davies, Manfred Finckh, Amândio Gomes, Francisco Maiato P. Gonçalves, Paulina Meller, Alan J. Paton

Abstract: Four new species are described from central and eastern Angola and adjacent NW Zambia. All occur in Kalahari sand savannas rich in endemic and more widely distributed geoxylic suffrutices. Despite being known from very few collections, the conservation status of one of these new species is assessed as Least Concern, as these grasslands are nutrient-poor, are in remote sparsely populated areas, and are not threatened with conversion to agriculture. The remaining three are treated as Data Deficient. In addition, one new combination is provided for Ancylanthos rubiginosus Desf. under Vangueria as V. rubiginosa (Desf.) Lantz is an illegitimate later homonym. We also make orthographic corrections to specific epithets commemorating Ilse von Nolde, a collector who made important collections from Quela in Malange in the 1930s.

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Research Article Wed, 20 Sep 2023 16:31:27 +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
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 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
A new species of Schlegelia (Schlegeliaceae) from wet montane forest of Colombia and a key for the species of the genus https://phytokeys.pensoft.net/article/107398/ PhytoKeys 230: 257-269

DOI: 10.3897/phytokeys.230.107398

Authors: Gerardo A. Aymard Corredor, M. Alejandra Jaramillo

Abstract: In this paper we describe and illustrate Schlegelia longirachis a new species from montane forest remnants (1200--1900 m) in the Western slope of the Eastern Cordillera of Colombia (“Serranía de Las Quinchas” and Virolín county) in the Departments of Boyacá and Santander. A root-climbing liana, the new species is contrasted to S. fuscata, S. monachinoi and S. parviflora, the three most morphologically similar species of Schlegelia. This new species is differentiated from its putative close relatives by vegetative (texture, colour, pubescence and shape in leaves, bracts, bracteoles pedicel, calyx and corolla), inflorescences as well as floral characters (staminode absent). We provide an updated key to 24 known species of Schlegelia. For the identification key, S. fuscata and S. roseiflora are regarded here as different from S. parviflora. S. urbaniana is considered a synonym of S. axillaris, whereas S. fastigiata is separated from S. sulphurea as a recognizable species. Schlegelia has its center of distribution in Colombia, where 17 of the species are known to occur.

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Research Article Fri, 11 Aug 2023 14:22:03 +0300
Primulina pingnanensis, a new species of Gesneriaceae from Guangxi, China https://phytokeys.pensoft.net/article/103735/ PhytoKeys 229: 157-165

DOI: 10.3897/phytokeys.229.103735

Authors: Zheng-Long Li, Yan-Yun Kuang, Qing-Qing Xu, Wei-Chuen Chou, Xin Hong, Li Ding

Abstract: A new species of Primulina, P. pingnanensis, from the Guangxi Zhuangzu Autonomous Region, China, is described and illustrated here. It is morphologically similar to P. orthandra but has significant differences in the bracts, corolla tube and lobes shape, as well as in the indumentum of the outer surface of the corolla, the filaments, the staminodes and the anthers. Colorful photographs and essential information of this new taxon are also provided, including detailed taxonomic description, distribution, habitat, the comparison table, and the IUCN conservation status. We also discuss a validation of new combination P. crassifolia and Chirita crassifolia.

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Research Article Thu, 27 Jul 2023 10:38:05 +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
Nomenclature and typification in Verbascum (Scrophulariaceae) from North Africa https://phytokeys.pensoft.net/article/99356/ PhytoKeys 225: 115-152

DOI: 10.3897/phytokeys.225.99356

Authors: Hamid Khamar, Jalal El Oualidi, Amina Ouazzani Touhami, Laure Civeyrel

Abstract: The progress of taxonomic work on native Verbascum L. taxa found in Morocco led to a search for reference specimens in various herbaria. This process was extended to the taxa found in the other four countries of North Africa (Algeria, Tunisia, Libya, and Egypt), which make up the southern shore of the Mediterranean basin. Numerous names were identified as needing typification or requiring corrections of their earlier lectotypifications in order to stabilize their nomenclature and provide a better definition of each taxon. As a result, lectotypes are now designated for 35 names, a neotype is proposed for V. ballii (Batt.) Hub.-Mor., and second-step lectotypes are proposed for V. faurei subsp. acanthifolium (Pau) Benedí & J.M.Monts. and V. pinnatisectum (Batt.) Benedí. Comments have been added for each typified name. Known isolectotypes are also mentioned whenever possible. Furthermore, some new combinations are proposed in this paper, namely V. longirostre var. antiatlantica (Emb.) Khamar, comb. nov., V. longirostre var. atlantica (Maire) Khamar, comb. nov., and V. longirostre var. hoggarica (Maire) Khamar, comb. nov.

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Research Article Thu, 27 Apr 2023 22:19:09 +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
Contributions to Ecuadorian butterworts (Lentibulariaceae, Pinguicula): two new species and a re-evaluation of Pinguicula calyptrata https://phytokeys.pensoft.net/article/98139/ PhytoKeys 222: 153-171

DOI: 10.3897/phytokeys.222.98139

Authors: Álvaro J. Pérez, Francisco Tobar, Kevin S. Burgess, Tilo Henning

Abstract: Comparatively few species of the insectivorous genus Pinguicula L. have been recognized in South America so far. In recent years, a number of narrowly endemic taxa from the Andes have been described that simultaneously refined the broad taxonomic concepts of the “historical” species. Here, we describe two striking new species from Southern Ecuador that further condense the circumscription of Pinguicula calyptrata Kunth. Pinguicula jimburensis sp. nov. and P. ombrophila sp. nov. are clearly beyond the taxonomic scope of the known species and consequently described as new to science. The deviating morphological features of the two new taxa are described and illustrated and the remaining morphological spectrum of P. calyptrata in Ecuador is outlined. The two new species add to the exceptional biodiversity in the Amotape-Huancabamba Zone and underline its importance as a biodiversity hotspot in urgent need of protection.

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Research Article Fri, 24 Mar 2023 19:08:53 +0200
Aeschynanthus smaragdinus F.Wen & J.Q.Qin (Gesneriaceae), a new species from Yunnan Province, China https://phytokeys.pensoft.net/article/98040/ PhytoKeys 220: 65-73

DOI: 10.3897/phytokeys.220.98040

Authors: Jia-Qi Qin, Rui-Feng Li, Yan-Ping Pang, Fang Wen

Abstract: Aeschynanthus smaragdinus F.Wen & J.Q.Qin, a new species of Gesneriaceae from the monsoon rain forest in Mangbang township, Tengchong City, Yunnan Province, China, is described and illustrated here. It morphologically resembles A. chiritoides C.B.Clarke in size, shape and hairs on the leaf blades. But it can easily be distinguished from the latter by the green corolla limb with brownish-red to maroon lower lobes. At the same time, the hairs of the pedicel and calyx lobes, the length of the staminode and the size of the seed grain can also help distinguish both. It is provisionally assessed as Data Deficient (DD), according to the IUCN Red List Categories and Criteria, because field surveys for this new taxon have not been completed.

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Research Article Fri, 24 Feb 2023 18:41:28 +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
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
Glossoloma magenticristatum (Gesneriaceae), a new species from the Cordillera Oriental of the Colombian Andes https://phytokeys.pensoft.net/article/97590/ PhytoKeys 218: 59-68

DOI: 10.3897/phytokeys.218.97590

Authors: David Hoyos, Laura Clavijo, John L. Clark

Abstract: A narrowly endemic new species of Glossoloma is described from the Cordillera Oriental of the northern Andes, in the Colombian departments of Caquetá and Huila. Glossoloma magenticristatum J.L.Clark, D.Hoyos & Clavijo, sp. nov. differs from most other congeners by a habit that is usually epiphytic with elongate scandent subwoody shoots, the presence of a magenta corolla tube, and a creased calyx formed by tightly appressed adjacent lobes. A brief summary of Gesneriaceae diversity in the Colombia departments of Caquetá and Huila is discussed with an emphasis on the old highway between Florencia and Guadalupe. The conservation status of G. magenticristatum is assessed as Endangered (EN) based on IUCN Criteria.

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Research Article Tue, 10 Jan 2023 20:41:16 +0200
Raphiocarpus taygiangensis (Gesneriaceae), a new species from central Vietnam https://phytokeys.pensoft.net/article/96511/ PhytoKeys 218: 19-27

DOI: 10.3897/phytokeys.218.96511

Authors: Cuong Huu Nguyen, Khoa Van Phung, Khang Sinh Nguyen, Leonid V. Averyanov, Vuong Ba Truong, Chu Van Tran, Hai Xuan Cao, Quan Ngoc Chu, Hau Bich Thi Vu, Thoa Kim Thi Pham

Abstract: Raphiocarpus taygiangensis, a new species of Gesneriaceae family discovered in Tay Giang District, Quang Nam Province, Central Vietnam, is here described and illustrated. The new species is diagnosed by the combination of its stem up to 2 m long, sericeous hairs on young stem, leaf petiole and adaxial mid-vein, sparsely and minutely serrate leaf margin, axillary inflorescence spreading along stem, sparsely long gland-tipped hairs on peduncle, pedicel, calyx, outside corolla and pistil, calyx 5-disparted from base, purplish white flower with purple stripes inside corolla tube, and dish-shaped stigma formed by 2 semi-orbicular lobes horizontally expanding. Distinct features of the new species and its morphologically closest congener, Rhaphiocarpus axillaris, are compared and discussed. The conservation status of the described species is estimated as Vulnerable (VU D2) according to the IUCN Red List Criteria.

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Research Article Tue, 10 Jan 2023 20:38:31 +0200
Microchirita minor (Gesneriaceae), a new species from north-western Vietnam https://phytokeys.pensoft.net/article/90859/ PhytoKeys 215: 65-71

DOI: 10.3897/phytokeys.215.90859

Authors: Zi-Bing Xin, Rui-Feng Li, Stephen Maciejewski, Long-Fei Fu, Truong Van Do, Fang Wen

Abstract: Microchirita minor (Gesneriaceae), a new species from the limestone area in Son La Province, north-western Vietnam, is described here. The new species resembles M. hamosa, but it differs by the combination of corolla tube shape, stamens number and the length of pistil. Detailed morphological description, together with photographic plates, information on phenology, distribution, ecology and preliminary conservation status of the new species are presented.

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Research Article Thu, 15 Dec 2022 10:53:03 +0200
Morphological diversity of pistil stigmas and its taxonomic significance of representatives of holoparasitic Orobanchaceae from Central Europe https://phytokeys.pensoft.net/article/96263/ PhytoKeys 215: 1-25

DOI: 10.3897/phytokeys.215.96263

Authors: Karolina Ruraż, Renata Piwowarczyk

Abstract: The stigma is the terminal part of the carpel which receives pollen during the pollination process. Although the role of the stigmas in pollination is the same for all angiosperms, stigmas structures are very diverse. This study aimed to evaluate intraspecific, interspecific and intergeneric stigmas variability and then find differences of the stigma morphology amongst 24 holoparasitic Orobanche and Phelipanche species and provide new insights into its potential taxonomic value. This paper was also focused on selecting the best diagnostic features that would be used for future stigma analysis in other species of Orobanchaceae. These analyses were conducted with fresh, dry and fixed material using stereomicroscopy from different locations from Central Europe. Twenty-one quantitative or qualitative morphological features were analysed. This study highlights the variation of stigma morphology and characters which are useful to improve the taxonomic understanding of problematic taxa. Thus, two main types of stigmas were established, based on tested features: 1–oval, rarely hemispherical in shape, most often one-coloured with lobes separated in Phelipanche stigmas; 2–spherical to hemispherical, rarely oval, multi-coloured with partially fused or separated lobes in Orobanche stigmas. The best diagnostic features of the stigmas for distinguishing the Orobanchaceae are the type and subtype of stigma, the length and area of the stigma, the width of single lobes, the width in the middle part of the stigma, the length of upper and lower separation in the middle part between lobes and the angle between lobes in the upper and lower part. The morphological features of the stigmas are important criteria for distinguishing genera, sections and subsections, as well as related species. In this study, we present the first stigma morphological studies for the most numerous genera from the tribe Orobancheae and this paper may determine features possible to use in solving certain taxonomic problems and evolutionary relationships of the species.

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Research Article Tue, 6 Dec 2022 09:47:58 +0200
Oreocharis polyneura, a new species of Gesneriaceae from southern Yunnan, China https://phytokeys.pensoft.net/article/93901/ PhytoKeys 214: 7-15

DOI: 10.3897/phytokeys.214.93901

Authors: Yan-Xiong Gong, Hong-Bo Ding, Xiang-Shuai Yan, Fang Wen, Yao-Hua Tian, Yun-Hong Tan

Abstract: Oreocharis polyneura, a new species from southern Yunnan, China, is described and illustrated. It is morphologically similar to O. rhytidophylla by having more obvious lateral veins forming a crosslinked network on the adaxial surface of leaf blades, but can be distinguished by having more lateral veins (12–15 pairs vs. 7–9 pairs) of leaf blades, shorter corolla tubes (the length ratio of corolla tube to corolla lobes = 1.2–2.9 vs. 3.4–6) and shorter pistils (6–8 mm long vs. 27–30 mm long). In addition, a detailed morphological description, a photographic illustration, the distribution and phenology of the new species are presented.

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Research Article Tue, 22 Nov 2022 17:23:00 +0200
Oreocharis qianyuensis, a new species of Gesneriaceae from Southwest, China based on morphological and molecular evidence https://phytokeys.pensoft.net/article/84349/ PhytoKeys 213: 119-130

DOI: 10.3897/phytokeys.213.84349

Authors: Jia-Wen Yang, Xin-Mei Qin, Jian Xu, Cong-Rui Li, Qi-Fei Ren, Mao-Qin Yuan, Qiang Zhang, Si-Rong Yi, Lei Cai

Abstract: Oreocharis qianyuensis, a new species of Gesneriaceae from Southwest, China, is described and illustrated based on morphological comparisons and molecular phylogenetic analyses. Phylotranscriptomic analyses of the new species in the context of a comprehensive phylogeny with dense sampling of 88% (111/126) of all species of the genus indicated that the new species was most closely-related to O. fargesii. The new species is morphologically similar to O. fargesii and O. nanchuanica in the shape, color and structure of flowers and the number of stamens, but differs in the leaf blade shape, margin and the indumentum characters of the inflorescence. Its morphological relationship with similar species is discussed, the detailed descriptions, colour photographs, distribution, as well as the IUCN threatened status based on the IUCN Red List Categories and Criteria are also provided.

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Research Article Tue, 15 Nov 2022 17:44:12 +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
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
Monopyle glutinosa (Gesneriaceae), a new species from the western slopes of the Ecuadorian Andes https://phytokeys.pensoft.net/article/89520/ PhytoKeys 210: 15-21

DOI: 10.3897/phytokeys.210.89520

Authors: John L. Clark, Franciso Tobar, Jeremy Keene

Abstract: Exploratory field expeditions to the western slopes of the Ecuadorian Andes resulted in the discovery of a new species of Monopyle (Gesneriaceae). Monopyle glutinosa J.L.Clark & Keene, sp. nov. is described as a narrow endemic from lowland forests along the border of the Reserva Ecológica Los Illinizas in the Province of Cotopaxi. The new species is unique for the presence of glutinous or sticky trichomes on the calyx lobes and outer surface of the inferior ovary. Based on IUCN guidelines, a preliminary conservation status is assigned as Critically Endangered (CR).

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Research Article Wed, 28 Sep 2022 19:02:28 +0300
Mosla dadoensis (Lamiaceae), a new species from the southern islands of South Korea https://phytokeys.pensoft.net/article/89552/ PhytoKeys 208: 185-199

DOI: 10.3897/phytokeys.208.89552

Authors: Hyun-Do Jang, Kwi-Kwan Jeong, Myoung-Ja Nam, Jun-Ho Song, Hye-Kyoung Moon, Hyeok Jae Choi

Abstract: Mosla dadoensis (Lamiaceae), a new species from the southern islands of South Korea, is described and illustrated. The new species is morphologically similar to M. chinensis, but is distinguished from the latter by having two types of hairs on its stems, wider leaf blades, longer corolla length, and ellipsoid nutlets with a narrowly U-shaped extended area of abscission scar. Mosla dadoensis is also distinguished from the Chinese narrow endemic M. hangchouensis by having an included pistil to the corolla, smaller ellipsoid nutlets, and later flowering and fruiting season. Phylogenetic analyses, based on two nuclear ribosomal (ETS, ITS) and three chloroplast (rbcL, matK, trnL-F) DNA regions, confirmed that the new species was constructed as monophyletic, and that M. dadoensis and M. hangchouensis form a sister group with robust support. We hereby provide a detailed morphological description of M. dadoensis with its corresponding geographical distributions, and comparison tables of related taxa.

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Research Article Wed, 21 Sep 2022 10:43:26 +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
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
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
Mazus danxiacola (Mazaceae), a distinct new species endemic to Danxia landform in Jiangxi Province, eastern China https://phytokeys.pensoft.net/article/85717/ PhytoKeys 199: 17-28

DOI: 10.3897/phytokeys.199.85717

Authors: Bo Li, Xin-Gui Le, Dao-Zhang Min, Lin Xu, Bin Chen

Abstract: Mazus danxiacola, a new species endemic to Danxia landform in east Jiangxi Province, eastern China, is described and illustrated. The systematic placement of this new species was confirmed by molecular phylogenetic analyses based on four plastid markers (matK, rbcL, rps16 and trnL-trnF) and nuclear ribosome ITS sequence, and its specific relationships within Mazus were discussed. Morphologically, the new species is clearly different from other Mazus species by having a series of uncommon traits, i.e., annual habit, without stolons and basal leaves, single, erect and unbranched stems, long petiolate leaves abaxially grayish green to silver gray, truncate to broadly cuneate leaf bases, racemes extremely elongated up to 35 cm long, white corolla, and palate densely covered by conspicuous clavate gland-like hairs. The new species is assigned to Critically Endangered (CR) according to the IUCN Red List Categories and Criteria.

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Research Article Fri, 3 Jun 2022 21:32:02 +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
Two new pendulous epiphytic Columnea L. (Gesneriaceae) species from the Chocó forests of the Northern Andes https://phytokeys.pensoft.net/article/79673/ PhytoKeys 196: 49-61

DOI: 10.3897/phytokeys.196.79673

Authors: Francisco Tobar, James F. Smith, John L. Clark

Abstract: Exploratory field expeditions to the Chocó forests in the northwestern slopes of the Ecuadorian and Colombian Andes resulted in the discovery of two new species of Columnea (Gesneriaceae). Columnea fluidifolia J.L.Clark & F.Tobar, sp. nov., is described as a narrow endemic from Bosque Protector Mashpi and surrounding areas in the province of Pichincha in northern Ecuador. Columnea pendens F.Tobar, J.L.Clark & J.F.Sm., sp. nov., is described from recently discovered populations in the provinces of Carchi and Santo Domingo de los Tsáchilas (Ecuador) and the departments of Cauca and Nariño in southwestern Colombia. The two new species are pendent epiphytes with elongate shoots and shallowly bilabiate to nearly tubular corollas. Descriptions, complete specimen citations, and a distribution map are provided. Based on IUCN guidelines, a preliminary conservation status of Critically Endangered (CR) is provided for C. fluidifolia and Endangered (EN) is provided for C. pendens.

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Research Article Mon, 16 May 2022 12:09:34 +0300
Rediscovery of Gasteranthus extinctus L.E.Skog & L.P.Kvist (Gesneriaceae) at multiple sites in western Ecuador https://phytokeys.pensoft.net/article/79638/ PhytoKeys 194: 33-46

DOI: 10.3897/phytokeys.194.79638

Authors: Nigel C. A. Pitman, Dawson M. White, Juan Ernesto Guevara Andino, Thomas L. P. Couvreur, Riley P. Fortier, José Nicolás Zapata, Xavier Cornejo, John L. Clark, Kenneth J. Feeley, Mark K. Johnston, Alix Lozinguez, Gonzalo Rivas-Torres

Abstract: We report the rediscovery of the Critically Endangered cloud forest herb Gasteranthus extinctus, not seen since 1985. In 2019 and 2021, G. extinctus was recorded at five sites in the western foothills of the Ecuadorian Andes, 4–25 km from the type locality at the celebrated Centinela ridge. We describe the species’ distribution, abundance, habitat and conservation status and offer recommendations for further research and conservation efforts focused on G. extinctus and the small, disjunct forest remnants it occupies.

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Short Communication Fri, 15 Apr 2022 14:59:01 +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
Orobanche ingens (Orobanchaceae) – a poorly known species of the Greater Caucasus: taxonomic problems, distribution, hosts and habitats https://phytokeys.pensoft.net/article/79886/ PhytoKeys 193: 55-66

DOI: 10.3897/phytokeys.193.79886

Authors: Renata Piwowarczyk, Óscar Sánchez Pedraja, Alexander V. Fateryga, Sergey A. Svirin

Abstract: Orobanche ingens is an endemic species from the Caucasus, especially the Greater Caucasus, parasitising on large Apiaceae (usually Heracleum). This species was misclassified over the years and little was known about its range and habitats. Here, we clarify the typification, as well as provide notes about the taxonomy of this species. Additionally, we presented distribution, habit and host range of O. ingens and morphological features that distinguish it from similar species.

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Short Communication Thu, 17 Mar 2022 17:38:24 +0200
Oreocharis phuongii (Gesneriaceae), a new species from central Vietnam https://phytokeys.pensoft.net/article/77083/ PhytoKeys 193: 43-53

DOI: 10.3897/phytokeys.193.77083

Authors: Khuong Duy Le, Thanh Trung Nguyen, Phuong Thanh Nguyen, Thao Thi Hoang, Fang Wen, Truong Van Do

Abstract: Oreocharis phuongii, a new species of Gesneriaceae from central Vietnam, is described and illustrated here. The new species is most similar to O. longifolia by sharing peduncles up to 22 cm long, bracts 2, zygomorphic, yellow flowers with tubular corolla, stamens 4 with two pairs of coherent anthers and capsules up to 6 cm long. It mainly differs from the latter by the combination of some morphological characters of leaves (shape, base, apex and margin), size of calyx lobes, indumentum of corolla tube and inner surface of three lower corolla lobes. Detailed morphological description together with colour illustration, information on phenology, distribution, ecology, preliminarily conservation status of the new species and comparison with its similar species are also presented.

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Research Article Thu, 17 Mar 2022 17:36:20 +0200
Two new species of Drymonia (Gesneriaceae) from Northwestern South America, including the discovery of the longest flower known in the genus https://phytokeys.pensoft.net/article/72740/ PhytoKeys 190: 1-14

DOI: 10.3897/phytokeys.190.72740

Authors: John L. Clark, Laura Clavijo

Abstract: Two new species, Drymonia intermedia Clavijo & J.L.Clark, sp. nov. and D. longiflora J.L.Clark & Clavijo, sp. nov. (Gesneriaceae, Columneinae), are described from the western Andean slopes of Ecuador and Colombia. The new species are similar to D. fimbriata, D. laciniosa, D. macrophylla, and D. peponifera because of the facultative epiphytic habit, deeply serrate to laciniate calyx margins, and fleshy bivalved capsules with tardily dehiscent endocarps. Leaves with brochidodromous venation, narrowly elongate corolla tube, and laciniate calyx margins differentiate D. intermedia. The longest corolla of any known Drymonia (> 6.5 cm long) differentiates D. longiflora. Digital photographs, geographic distributions, and IUCN categories are provided for the new species.

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Research Article Thu, 17 Feb 2022 10:36:38 +0200
Molecular and morphological evidence for a new species of Pogostemon (Lamiaceae) from Hainan Island, China https://phytokeys.pensoft.net/article/76611/ PhytoKeys 188: 177-191

DOI: 10.3897/phytokeys.188.76611

Authors: Langxing Yuan, Gan Tan, Wenhua Zhang, Bine Xue, Jiwen Deng, Lei Liu, Gang Yao

Abstract: Pogostemon hainanensis, a new species of Lamiaceae from Hainan Island, China, is described. The phylogenetic position of the new species within Pogostemon was investigated based on analyses of the nuclear ribosomal internal transcribed spacer (nrITS) and five plastid markers (viz. matK, psbA-trnH, rbcL, rsp16, trnL-F). The results show that P. hainanensis is supported to be a member of subgenus Pogostemon and is sister to P. parviflorus, a species widely distributed from Eastern Himalaya, through the Indo-China peninsula to China. Morphologically, the new species can be distinguished from all the other taxa of subgenus Pogostemon in having long petioles usually 4.5‒11.5 cm in length, and the calyx teeth 2/3 to subequal as long as the calyx tube. The new species differs from P. parviflorus further by its obviously double serrate leaf margin, spikes of inflorescence usually 2.5–8.0 cm long, calyx 4‒5 mm long and corolla 6–7 mm long.

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Research Article Fri, 21 Jan 2022 10:51:40 +0200
Primulina scutellifolia, a new species of Gesneriaceae from southern Vietnam https://phytokeys.pensoft.net/article/77856/ PhytoKeys 187: 15-21

DOI: 10.3897/phytokeys.187.77856

Authors: Ngoc Long Vu, Tran Quoc Trung Nguyen, Gioi Tran, Quoc Dat Nguyen, Hong Truong Luu

Abstract: Primulina scutellifolia is described as a new species from Khanh Hoa Province, southern Central Vietnam. It is distinct in the genus in having scutellate leaves that make it a highly potential ornamental plant. The new species looks like P. annamensis in general shapes, sizes and colours of habit, inflorescence, flower, and leaf but is distinguishable by adaxially glabrous and abaxially strigose leaves with serrate margins, scutellate leaf blade and appressed downwards tomentose petiole, sparsely glandular hairs on apical 1/2 of the gynoecium and trapeziform one-lipped stigma with slightly emarginated apex.

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Research Article Mon, 13 Dec 2021 14:42:54 +0200
Phelypaea boissieri f. lutea (Orobanchaceae), a peculiar new form from Turkey and typification of the name of this species https://phytokeys.pensoft.net/article/77575/ PhytoKeys 186: 159-167

DOI: 10.3897/phytokeys.186.77575

Authors: Ümit Subaşı, Óscar Sánchez Pedraja, Renata Piwowarczyk

Abstract: The genus Phelypaea includes three holoparasite species with one of the most intense red flowers among all plants worldwide. So far, there are few references to other colour taxa of this genus. We describe a new yellow-coloured form, Phelypaea boissieri f. lutea, from Hakkari province in the Cilo Mountains of SE Turkey, found at an altitude of 2,470 m. In typical P. boissieri, here typified by us, the flowers are deeply red, and stems, calyx and scales are red to brown, or rarely pale-brown, whereas in the entire population of f. lutea the corolla, calyx, and scales are yellow to orange with black folds in the corolla, while only the stem is brownish.

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Short Communication Thu, 9 Dec 2021 13:44:56 +0200
On the identity of Thymus humifusus var. aureopunctatus (Lamiaceae) and taxonomic notes on the Th. richardii complex https://phytokeys.pensoft.net/article/75412/ PhytoKeys 186: 139-158

DOI: 10.3897/phytokeys.186.75412

Authors: Llorenç Sáez, Faruk Bogunić, Salvatore Cambria, Jesús Riera, Sandro Bogdanović

Abstract: The name Thymus humifusus var. aureopunctatus, described from Bosnia and Herzegovina, is lectotypified, and its taxonomic value is discussed. Thymus richardii subsp. richardii is currently considered an endemic subspecies common to Mallorca (Balearic Islands) and Bosnia and Herzegovina from the Balkan Peninsula. Specimens identified as Th. richardii from both Balearic Islands and Bosnia and Herzegovina were studied to determine if they are indeed the same taxonomic entity. Detailed micromorphological observations and morphometric analysis, suggest that the Balkan plants (Th. humifusus var. aureopunctatus) and the Majorcan populations (Th. richardii subsp. richardii) are clearly separate entities. For the former name, based on morphological, phytochemical, biogeographical and present results, we propose the subspecific rank, as Th. richardii subsp. aureopunctatus comb. & stat. nov. Full descriptions of all five subspecies currently accepted within Th. richardii are provided.

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Research Article Thu, 9 Dec 2021 11:49:01 +0200
 Coleus (Lamiaceae) in Peninsular Malaysia including two new species https://phytokeys.pensoft.net/article/62018/ PhytoKeys 186: 93-110

DOI: 10.3897/phytokeys.186.62018

Authors: Ruth Kiew, Imin Kamin

Abstract: In Peninsular Malaysia, Coleus is represented by five species. Two, C. hairulii Kiew and C. rafidahiae Kiew, are new species. Both are narrowly endemic and restricted to limestone hills as is C. kunstleri (Prain) A.J.Paton. All three are Critically Endangered. Coleus scutellarioides (L.) Benth., although widespread, is probably not indigenous. It is also a common ornamental, while C. monostachyus (P.Beauv.) A.J.Paton is a recent introduction that has spread rapidly and threatens to become a troublesome weed.

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Research Article Mon, 6 Dec 2021 12:20:51 +0200
Glossoloma wiehleri (Gesneriaceae), a new species from the northwestern Andes of Ecuador https://phytokeys.pensoft.net/article/73554/ PhytoKeys 186: 1-9

DOI: 10.3897/phytokeys.186.73554

Authors: John L. Clark, Francisco Tobar

Abstract: A new species of Glossoloma is described from the western Andean slopes of the Pichincha Province in northern Ecuador. Glossoloma wiehleri J.L.Clark & Tobar is differentiated from all other congeners by an epiphytic habit, elongate scandent shoots that exceed four meters in length, and coriaceous leaves with a velutinous indument on the lower leaf surface. The new species is illustrated, featured with field images from recent expeditions, and assigned the category of Endangered (EN) according to IUCN Criteria.

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Research Article Mon, 29 Nov 2021 09:04:01 +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
Calceolaria flavida (Calceolariaceae) a new endemic species to central Chile https://phytokeys.pensoft.net/article/71755/ PhytoKeys 185: 99-116

DOI: 10.3897/phytokeys.185.71755

Authors: Nicolás Lavandero, Ludovica Santilli, Fernanda Pérez

Abstract: A new species of Calceolaria sect. Cheiloncos endemic to central Chile is described. A comparison with the morphologically similar species Calceolaria asperula and Calceolaria petioalaris is made, and a key as well as detailed images to differentiate them is provided. The species is only known from the Natural Sanctuary Cerro El Roble, which is part of the coastal mountain range of central Chile and can be considered as Critically Endangered (CR) under the IUCN categories and criteria.

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Research Article Wed, 17 Nov 2021 08:23:52 +0200
Hemiboea chanii (Gesneriaceae), a new species from limestone areas of northern Vietnam https://phytokeys.pensoft.net/article/69180/ PhytoKeys 183: 108-114

DOI: 10.3897/phytokeys.183.69180

Authors: Cuong Huu Nguyen, Ly Van Nguyen, Khang Sinh Nguyen, Alexander A. Egorov, Leonid V. Averyanov

Abstract: Hemiboea chanii, a new species of Gesneriaceae from Ha Giang Province, northern Vietnam, is here described and illustrated. It has many branched stems, diamond-shaped involucre with two cirrose opposite apices, a pink corolla, red spotted inside, and a flowering time in January-February. Among congeners with an externally hairy corolla, this new species is morphologically close to H. crystallina and H. sinovietnamica. Diagnostic discriminative characters in all mentioned species are discussed. The conservation status of this species is considered to be “Critically endangered” (CR) according to the IUCN Red List Categories and Criteria.

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Research Article Fri, 22 Oct 2021 10:28:15 +0300
Nomenclatural notes and typification of nine names related to Jasminum (Oleaceae) https://phytokeys.pensoft.net/article/69852/ PhytoKeys 183: 55-65

DOI: 10.3897/phytokeys.183.69852

Authors: Bui Hong Quang, Ritesh Kumar Choudhary, Joongku Lee

Abstract: Lectotypes are designated here for the following nine validly published names: Jasminum alongense, J. anodontum, J. eberhardtii, J. harmandianum, J. lang, J. laxiflorum, J. pierreanum, J. rufohirtum, and J. sinense. Jasminum lang is reinstated as a distinct species.

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Research Article Tue, 12 Oct 2021 15:16:14 +0300
Three new species of Columnea (Gesneriaceae) from the western Andean slopes of Ecuador and Colombia https://phytokeys.pensoft.net/article/69016/ PhytoKeys 182: 67-82

DOI: 10.3897/phytokeys.182.69016

Authors: John L. Clark, Francisco Tobar, Laura Clavijo, Mathieu Perret, Catherine Helen Graham

Abstract: Three new species of Columnea (Gesneriaceae, tribe Gesnerieae) are described from the western Andean slopes of northern Ecuador and southern Colombia. Columnea angulata J.L. Clark & F. Tobar and Columnea floribunda F. Tobar & J.L. Clark are described from northern Ecuador. Columnea tecta J.L. Clark & Clavijo is described from southern Colombia and northern Ecuador. The three new species are facultative epiphytes with dorsiventral shoots and are readily recognized by bright red tips on the abaxial and adaxial leaf surfaces. The species described here are vegetatively similar to the sympatric species Columnea picta H. Karst. and are readily differentiated by floral features that are illustrated, described and featured with digital images.

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Research Article Mon, 20 Sep 2021 15:58:30 +0300
Petrocosmea duyunensis (Gesneriaceae), a new species from Guizhou, China https://phytokeys.pensoft.net/article/68635/ PhytoKeys 181: 1-8

DOI: 10.3897/phytokeys.181.68635

Authors: Sheng-Hu Tang, Jia-Wen Yang, Cong-Rui Li, Qing Zhou

Abstract: Plants belonging to the genus Petrocosmea are rare and small herbs difficult to find in the wild. In the present study, a new species, Petrocosmea duyunensis, from Guizhou, China, is described. The species is most similar to P. leiandra and differs from it by a distinctly recurved abaxial corolla lip, free anthers and included pistil. Detailed morphological comparisons are given. One population with about 100 mature individuals was found at the type locality. This new taxon was assessed as “Data Deficient” (DD) according to the IUCN standards.

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Research Article Mon, 16 Aug 2021 13:30:36 +0300
New circumscriptions add two northern Andean species to Kohleria (Gesneriaceae) https://phytokeys.pensoft.net/article/65990/ PhytoKeys 179: 99-110

DOI: 10.3897/phytokeys.179.65990

Authors: John L. Clark, Lou Jost

Abstract: Recent studies of type specimens and exploratory research expeditions in the northern Andes have resulted in an updated circumscription and recognition for two species of Kohleria (Gesneriaceae) in Ecuador and Colombia. A change in the rank from a variety to species is recognized for Kohleria anisophylla (Fritsch) Wiehler. The combination Kohleria andina (Fritsch) J.L. Clark & Jost, comb. nov. is provided here and a lectotype is designated. The updated circumscriptions of these two species are supported by morphology and geographic distribution. The presence of an epiphytic habit for Kohleria is discussed. Field images based on recent expeditions are provided to support the circumscriptions presented here.

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Research Article Mon, 12 Jul 2021 09:21:32 +0300
On a noteworthy habitat type in the savannahs of Central Cuba and a remarkable new species of Elytraria (Acanthaceae) https://phytokeys.pensoft.net/article/64764/ PhytoKeys 177: 117-124

DOI: 10.3897/phytokeys.177.64764

Authors: Werner Greuter, Rankin Rodríguez

Abstract: A peculiar habitat type found in the savannahs of Central Cuba, Villa Clara Province and characterised by the presence of a surface gravel layer of “perdigones”, an assemblage of small ferralitic concretions, upon the “mocarrero” soil prevailing in the area, is described. On sterile gravel patches, only one species grows: Elytraria serpens, a new species described and named here. It is noteworthy for possessing long and wide creeping, stoloniform subterranean peduncles with apical gemmae developing into rooting leaf rosettes enabling vegetative propagation. The new species is close to E. shaferi and considered to derive from the latter by adaptive evolution, enabling it to survive in its hostile habitat, sheltered from the competition of other plant species. Small soil insects, for example, ants, are believed to act as pollinators.

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Research Article Thu, 13 May 2021 10:32:59 +0300
Taxonomic revision of Martinella Baill. (Bignonieae, Bignoniaceae) https://phytokeys.pensoft.net/article/64465/ PhytoKeys 177: 77-116

DOI: 10.3897/phytokeys.177.64465

Authors: Eric Y. Kataoka, Lúcia G. Lohmann

Abstract: Martinella Baill. is a genus of Neotropical lianas in tribe Bignonieae (Bignoniaceae). The genus is monophyletic and well supported by morphological and molecular characters. Members of Martinella are characterized by a continuous interpetiolar ridge surrounding the stem, bilobed or 4–5-parted calyces, and minute triangular prophylls of the axillary buds. Generic circumscription remained unchanged since the description of the genus, although unclear species limits remained. Based on extensive fieldwork, herbarium work, and a molecular phylogenetic hypothesis for the genus, we here recognize five species of Martinella. Of these, three were recognized in earlier treatments for the genus, while two represent new species described here, Martinella lanuginosa Kataoka & L.G.Lohmann, sp. nov. and Martinella tomentosa Kataoka & L.G.Lohmann, sp. nov. Martinella iquitoensis A.Samp. is treated as a synonym of M. insculpta Sprague & Sandwith. In addition, one second-step lectotype is designated for Bignonia martini DC., and neotypes are designated for Doxantha longisiliqua Miers and Martinella gollmeri K.Schum. This work provides a full taxonomic treatment for Martinella, including a complete list of synonyms, morphological descriptions, illustrations, photographs, distribution maps, conservation status, and comments for all five species recognized.

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Monograph Thu, 13 May 2021 08:44:07 +0300
Chayamaritia vietnamensis (Gesneriaceae), a new species from Son La Province, northern Vietnam https://phytokeys.pensoft.net/article/63401/ PhytoKeys 177: 43-53

DOI: 10.3897/phytokeys.177.63401

Authors: Zi-Bing Xin, Long-Fei Fu, Stephen Maciejewski, Zhang-Jie Huang, Truong Van Do, Fang Wen

Abstract: Chayamaritia vietnamensis, a new species from Son La Province, northern Vietnam, is described and illustrated. The phylogenetic study revealed that the new species is most closely related to C. banksiae and C. smitinandii. The morphological comparison suggests it as the third new species of Chayamaritia and distinguished from C. banksiae and C. smitinandii by a combination of morphological characters of leaf blades, bracts, calyx and corolla, especially its peltate leaf blades. This species is provisionally assessed as endangered (EN B1ab(iii), B2ab(iii)) using IUCN Categories and Criteria. Information on ecology, phenology and an identification key for the known Chayamaritia species are also provided.

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Research Article Wed, 12 May 2021 14:38:18 +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
Chroesthes (Acanthaceae) in Peninsular Malaysia, including a new species from Kelantan and a new record from Terengganu https://phytokeys.pensoft.net/article/62023/ PhytoKeys 174: 127-146

DOI: 10.3897/phytokeys.174.62023

Authors: Siti-Munirah Mat Yunoh

Abstract: Chroesthes is a small genus that includes three species from Peninsular Malaysia: Chroesthes faizaltahiriana Siti-Munirah sp. nov., C. lanceolata (T. Anderson) B.Hansen and C. longifolia (Wight) B.Hansen. Chroesthes faizaltahiriana, recently discovered in the State of Kelantan, is described and illustrated. This species is similar to the common species C. longifolia, but is distinguished mainly by its inflorescence type, calyx shape and its flowers being bright orange instead of dark purple internally. Chroesthes lanceolata is a new record for Peninsular Malaysia and has only been collected once. Following the IUCN Red List Categories and Criteria, these three species are assessed (national scale assessment) as Critically Endangered (C. faizaltahiriana and C. lanceolata) and Least Concern (C. longifolia).

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Research Article Fri, 12 Mar 2021 10:57:53 +0200
Phylogeny and historical biogeography analysis support Caucasian and Mediterranean centres of origin of key holoparasitic Orobancheae (Orobanchaceae) lineages https://phytokeys.pensoft.net/article/62524/ PhytoKeys 174: 165-194

DOI: 10.3897/phytokeys.174.62524

Authors: Renata Piwowarczyk, Adam C. Schneider, Grzegorz Góralski, Dagmara Kwolek, Magdalena Denysenko-Bennett, Anna Burda, Karolina Ruraż, Andrzej J. Joachimiak, Óscar Sánchez Pedraja

Abstract: The extensive diversity of the tribe Orobancheae, the most species-rich lineage of holoparasitic Orobanchaceae, is concentrated in the Caucasus and Mediterranean regions of the Old World. This extant diversity has inspired hypotheses that these regions are also centres of origin of its key lineages, however the ability to test hypotheses has been limited by a lack of sampling and phylogenetic information about the species, especially in the Caucasus region. First, we assessed the phylogenetic relationships of several poorly known, problematic, or newly described species and host-races of four genera of Orobancheae occurring in the Caucasus region–Cistanche, Phelypaea, Phelipanche and Orobanche–using nuclear ribosomal (ITS) and plastid (trnL–trnF) sequence data. Then we applied a probablistic dispersal-extinction-cladogenesis model of historical biogeography across a more inclusive clade of holoparasites, to explicitly test hypotheses of Orobancheae diversification and historical biogeography shifts. In sum, we sampled 548 sequences (including 196 newly generated) from 13 genera, 140 species, and 175 taxa across 44 countries. We find that the Western Asia (particularly the Caucasus) and the Mediterranean are the centre of origin for large clades of holoparasitic Orobancheae within the last 6 million years. In the Caucasus, the centres of diversity are composed both of long-branch taxa and shallow, recently diversified clades, while Orobancheae diversity in the Mediterranean appears to represent mainly recent diversification.

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Research Article Fri, 12 Mar 2021 09:35:14 +0200
Taxonomic updates in Amphitecna (Bignoniaceae): A new Mexican species and the re-establishment of the giant-leaved A. megalophylla https://phytokeys.pensoft.net/article/55397/ PhytoKeys 171: 75-90

DOI: 10.3897/phytokeys.171.55397

Authors: Héctor Gómez-Domínguez, Andrés Ernesto Ortiz-Rodríguez, Delfilia Velasco-Espino, Rene Hernández-Burguete

Abstract: In this study, we analyzed the morphological affinities of the 24 species of Amphitecna based on detailed morphological studies and multivariate cluster analyses. Our results suggest that the genus Amphitecna includes six morphological groups that can be easily distinguished based on floral and fruits characteristics: A. donnell-smithii group, A. macrophylla group, A. megalophylla group, A. molinae group, A. spathicalyx group, and A. steyermarkii group. A new species from Mexico, Amphitecna fonceti, is described. This new species is clearly differentiated by the predominantly ramiflorous inflorescences bearing multiple flowers per shoot, buds rounded at the apex, large flowers with a transverse fold in the corolla throat, calyx surface pubescent and strongly costate, and fruits elliptic, apiculate at the apex. We discuss the characteristics of each morphological group and their geographical distribution, provide a detailed description of the new species including ethnobotany notes, and propose the re-establishment of the giant-leaved species A. megalophylla.

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Research Article Mon, 25 Jan 2021 10:52:52 +0200
Rediscovery of Pogostemon dielsianus (Lamiaceae, Lamioideae), a rare endemic species from southwestern China, after one century https://phytokeys.pensoft.net/article/60389/ PhytoKeys 171: 61-73

DOI: 10.3897/phytokeys.171.60389

Authors: Guo-Xiong Hu, Ting Su, Ming-Tai An, Xiao-Yu Wang

Abstract: Pogostemon dielsianus (Lamiaceae) was described in 1913 based on a single gathering from northwestern Yunnan of China collected in 1905, and thereafter no further collections were observed until 2019. We rediscovered the rare endemic species in Lushui County, Yunnan. Molecular phylogenetic analyses based on four cpDNA markers (rbcL, rps16, psbA-trnH, and trnL-trnF) and the nuclear ribosomal internal transcribed spacer (ITS) region confirmed its infrageneric placement within subg. Pogostemon. Based on observations of the rediscovered population of P. dielsianus, we updated its morphological description, provided an illustration, and discussed its distribution. Under IUCN criteria, the species was categorized as “Critically Endangered (CR)”.

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Research Article Tue, 12 Jan 2021 11:28:26 +0200
Rediscovery of Mazus lanceifolius reveals a new genus and a new species in Mazaceae https://phytokeys.pensoft.net/article/61926/ PhytoKeys 171: 1-24

DOI: 10.3897/phytokeys.171.61926

Authors: Chun-Lei Xiang, Hong-Li Pan, Dao-Zhang Min, Dai-Gui Zhang, Fei Zhao, Bing Liu, Bo Li

Abstract: Mazus lanceifolius (Mazaceae) is a perennial herb with opposite leaves and endemic to central China that has not been collected for 130 years. Rediscovery of this enigmatic species in the wild allows for determination of its phylogenetic position within Mazaceae. Phylogenetic reconstruction of Mazaceae based on DNA sequences from four plastid markers (matK, rbcL, rps16 and trnL-trnF) and nuclear ribosome ITS consistently showed that Mazus was not monophyletic. Mazus lanceifolius is in the most basal clade within Mazaceae, as sister to the remaining species of three recognized genera Dodartia, Lancea and Mazus. These results support the separation of M. lanceifolius from Mazus as a new genus, which was established here as Puchiumazus Bo Li, D.G. Zhang & C.L. Xiang. Meanwhile, a collection from Shennongjia Forestry District of Hubei Province, China, misidentified as “M. lanceifolius” in previous molecular study, is here revealed to represent an undescribed species of Mazus, i.e., M. fruticosus Bo Li, D.G. Zhang & C.L. Xiang, sp. nov. Morphologically, Puchiumazus is clearly distinct from the other three genera by having quadrangular to somewhat ribbed stems, and obviously opposite leaves. In addition, we provide a taxonomic key to the four genera of Mazaceae.

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Research Article Wed, 6 Jan 2021 14:40:19 +0200
Hidden biodiversity of Amazonian white-sand ecosystems: two distinctive new species of Utricularia (Lentibulariaceae) from Pará, Brazil https://phytokeys.pensoft.net/article/57626/ PhytoKeys 169: 75-98

DOI: 10.3897/phytokeys.169.57626

Authors: Paulo Minatel Gonella, Rafael Gomes Barbosa-Silva, Andreas S. Fleischmann, Daniela C. Zappi, Paulo Cesar Baleeiro, Caroline Oliveira Andrino

Abstract: As deforestation and fire move forward over pristine vegetation in the Amazon, many species remain undiscovered and may be threatened with extinction before being described. Here, we describe two new species of Utricularia (Lentibulariaceae) collected during recent fieldwork in an area of white-sand vegetation in the eastern Amazon Basin named Campos do Ariramba. Further herbarium revision revealed that both species were first collected over 60 years ago in the same area, remaining unnamed until now. The new species, named U. ariramba sp. nov. and U. jaramacaru sp. nov., are placed in U. sect. Aranella and U. sect. Setiscapella, respectively. We provide full descriptions, illustrations, photographs, a distribution map, and taxonomic discussion for both species. Additionally, we provide a preliminary list of Lentibulariaceae from the Campos do Ariramba. Both new species are assessed as Vulnerable, however, yet known only from a few collections each, highlighting the urgency and importance of fieldwork and taxonomic revisions in the Amazon biogeographic region in order to provide essential data for the conservation of both known and still unknown biodiversity.

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Research Article Fri, 4 Dec 2020 10:33:45 +0200
Pogostemon guamensis Lorence & W.L.Wagner (Lamiaceae), a new species from Guam, Mariana Islands https://phytokeys.pensoft.net/article/58107/ PhytoKeys 169: 61-73

DOI: 10.3897/phytokeys.169.58107

Authors: David H. Lorence, Warren L. Wagner, Kenneth R. Wood, Gabriel Johnson

Abstract: While undertaking a botanical survey of the Andersen Air Force Base on Guam (Mariana Islands) in 1994, botanists from the National Tropical Botanical Garden collected an unusual suffrutescent, non-aromatic member of the Lamiaceae family growing on limestone cliffs in the northeastern part of the island. Based on morphology and molecular data (trnLF, matK), it was determined to belong to the genus Pogostemon Desf., a genus previously unknown from the Micronesian, Melanesian, and Polynesian region. Moreover, the analysis also showed that it was not conspecific with P. cablin (patchouli), and of the species available to include in the phylogenetic analyses it is sister to P. hirsutus¸ a species from India and Sri Lanka. Differing from its congeners by its large, loose inflorescence 2.5–5 cm wide and up to 7 cm wide in fruit, it is here illustrated and described as a new species, Pogostemon guamensis Lorence & W.L. Wagner and its habitat and conservation status are discussed.

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Research Article Fri, 4 Dec 2020 09:41:54 +0200
Strobilanthes sunhangii (Acanthaceae), a new species from Tibet, China https://phytokeys.pensoft.net/article/58831/ PhytoKeys 166: 117-127

DOI: 10.3897/phytokeys.166.58831

Authors: Jun-Tong Chen, Xian-Han Huang, Zhen-Yu Lv, Tian-Hui Kuang, Jian Luo, Yun-Fei Deng, Tao Deng

Abstract: A new species of Acanthaceae, Strobilanthes sunhangii, is described from Mêdog County, Tibet, China. Morphologically, the new species is closely similar to S. medogensis and S. divaricata, but S. sunhangii differs in having glabrous stems, longer spikes, glabrous rachis, double curved corolla and glabrous calyx, different stamens and style.

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Research Article Fri, 13 Nov 2020 11:29:52 +0200
Two new species of Codonoboea (Gesneriaceae) from Kenaboi State Park, Peninsular Malaysia https://phytokeys.pensoft.net/article/56955/ PhytoKeys 165: 51-62

DOI: 10.3897/phytokeys.165.56955

Authors: Suhaimi Syahida-Emiza, Yen Yen Sam, Mat Yunoh Siti-Munirah

Abstract: Two new Codonoboea species, C. kenaboiensis Syahida-Emiza, Y.Y.Sam & Siti-Munirah and C. ruthiae Syahida-Emiza, Y.Y. Sam & Siti-Munirah were discovered from the Kenaboi State Park, Peninsular Malaysia. Descriptions, illustrations, colour plates and provisional conservation status are provided.

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Research Article Wed, 28 Oct 2020 13:02:14 +0200
Two new species of Oreocharis (Gesneriaceae) from karst regions in Yunnan and notes on O. tetraptera and O. brachypoda from China https://phytokeys.pensoft.net/article/52174/ PhytoKeys 162: 1-12

DOI: 10.3897/phytokeys.162.52174

Authors: Lei Cai, Zhang-Jie Huang, Fang Wen, Zhi-Ling Dao

Abstract: Two new species of Gesneriaceae, Oreocharis aimodisca and O. longipedicellata, from the limestone area of Yunnan Province, China, are described and illustrated. Their morphological relationship with similar species is discussed and colour photographs, detailed descriptions, distribution and habitat, as well as the IUCN endangered status are provided. We also discuss the accuracy of the scientific names of the described species O. tetrapterus from Guangxi, China in 2019 and O. brachypodus from Guizhou, China, in 2015, and put forward corrections related to name form.

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Research Article Wed, 7 Oct 2020 14:38:37 +0300
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
A new species of Besleria (Gesneriaceae) from the Serranía El Pinche (Cauca), southwestern Colombia https://phytokeys.pensoft.net/article/55891/ PhytoKeys 162: 71-80

DOI: 10.3897/phytokeys.162.55891

Authors: Jhon A. Sánchez-Taborda, Alejandro Zuluaga, Laura Clavijo

Abstract: A new species of the genus Besleria (Gesneriaceae), endemic to the department of Cauca, Colombia, is described and illustrated here. The new species, Besleria santaclarensis Clavijo & Sánchez-Taborda, was discovered in the Regional Protective Forest Reserve “Serranía El Pinche”, Cordillera Occidental of the Colombian Andes. B. santaclarensis is distinguished by the epedunculate inflorescences, usually in the leafless axils near the base, with up to eight orange flowers, and by the magenta calyx that covers 2/3 of the corolla.

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Research Article Wed, 7 Oct 2020 10:34:20 +0300
Henckelia siangensis (Gesneriaceae): a remarkable new species from Northeast India https://phytokeys.pensoft.net/article/54459/ PhytoKeys 160: 1-6

DOI: 10.3897/phytokeys.160.54459

Authors: Momang Taram, Dipankar Borah, Ojar Taku, Hui Tag

Abstract: Henckelia siangensis, a new species from Arunachal Pradesh of Northeast India, is described and illustrated here. The new species is remarkably different from all other allied species by its 5-winged calyx and elliptic-ovate calyx segments. It superficially resembles H. calva in glabrous stem and petioles, but differs from it in having persistent bracts, a campanulate 5-winged calyx and a style with glandular indumentum. A detailed morphological description, photographic illustration, and distribution of the new species are presented.

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Research Article Tue, 8 Sep 2020 10:03:56 +0300
Didymocarpus phuquocensis, a new species of Gesneriaceae from Phu Quoc Island, South-western Vietnam https://phytokeys.pensoft.net/article/47442/ PhytoKeys 159: 35-44

DOI: 10.3897/phytokeys.159.47442

Authors: Thi-Lien Tran, Ngoc-Sam Ly, Minh-Ngoc Tran, Xuan-Truong Nguyen, Ngoc-Giang Cao, Hong-Dung Pham

Abstract: A new species of Gesneriaceae, Didymocarpus phuquocensis, is described and illustrated from Phu Quoc National Park, Kien Giang Province, South-western Vietnam. It is most similar to D. pulcher, D. hookeri and D. punduanus in having 3-verticillate petiolate leaves, morphologically similar calyx, corolla, stamens, pistil and fruit, but differs from all in the glandular-pubescent stems, petioles and leaf blades, 1(–2)-flowered cymes, longer corolla and fruit and longer and densely glandular-puberulent ovary. Data on distribution, ecology, phenology and provisional conservation assessment of the new species are given along with an illustration and a colour plate.

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Research Article Fri, 4 Sep 2020 13:20:02 +0300
Primulina flexusa sp. nov. (Gesneriaceae) from Guizhou Province, China https://phytokeys.pensoft.net/article/55386/ PhytoKeys 159: 61-69

DOI: 10.3897/phytokeys.159.55386

Authors: Tao Peng, Bo Pan, Stephen Maciejewski, Fang Wen

Abstract: The limestone regions of Yunnan-Guangxi-Guizhou in southern and southwestern China are regarded as some of biodiversity’s hotspots for China’s Gesneriaceae where numerous rare new species of Primulina have been, or are being, described over the past two decades. Primulina flexusa, a new lithophytic species of Gesneriaceae from a limestone hill in a Karst area, from Guizhou, China, is described here with color photographs. It is similar to P. curvituba, but can be easily distinguished by a combination of characteristics, especially in the shape and length of its capsule. We found only one population with approximately 100 mature individuals at the type locality. This new species is provisionally assessed as Critically Endangered [CR C1] by using IUCN criteria.

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Research Article Fri, 4 Sep 2020 10:39:22 +0300
Two new taxa of Gesneriaceae in the karst regions in North Vietnam https://phytokeys.pensoft.net/article/54697/ PhytoKeys 157: 217-226

DOI: 10.3897/phytokeys.157.54697

Authors: Wen-Hong Chen, Shi-Wei Guo, Hieu Quang Nguyen, Li Chen, Yu-Min Shui

Abstract: One new species and one new variety of Gesneriaceae in Vietnam are described, viz. Paraboea sinensis var. glabrissima var. nov. and Primulina xuansonensis sp. nov. These two new taxa grow in limestone regions in North Vietnam. The former new variety differs from Paraboea sinensis (Oliv.) Burtt var. sinensis in its young leaf abaxially, stem and peduncle sparsely and thin pannose, acute top of leaves, pistil glandular-pubescent or pubescent. The latter new species differs in its bracts 1.6–2.5 × 1.3–1.5 cm, corolla 3–3.5 cm long, corolla tube slightly curved near the base and inflated on the adaxial surface near the corolla lobes, and corolla abaxial lip lobes rounded. The two new taxa grow at Xuan Son National Natural Reserve, North Vietnam and remain undisturbed with low risk of extinction.

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Research Article Wed, 26 Aug 2020 20:00:19 +0300
Two new species of Paraboea (Gesneriaceae) in Caryota obtusa forests in Southwest China, with compound and simple dichasia, respectively https://phytokeys.pensoft.net/article/32534/ PhytoKeys 157: 207-216

DOI: 10.3897/phytokeys.157.32534

Authors: Yu-Min Shui, Shi-Wei Guo, Li Chen, Wen-Hong Chen

Abstract: Two new species of Gesneriaceae, Paraboea myriantha sp. nov. and P. brevipedunculata sp. nov. are described and illustrated with photos. They grow in the Caryota obtusa forests from Yunnan Province of China. P. myriantha is closely related to P. glutinosa (Hand.-Mazz.) K.Y.Pan, but differs mainly in corolla outside glandular-puberulent, adaxial corolla lobes semicordate, corolla tube obliquely campanulate, and filaments glandular-puberulent. P. brevipedunculata is closely related to P. crassifolia (Hemsley) B. L. Burtt, but different mainly in simple dichasia with 1 and 2 flowers, peduncles 0.5–2 cm long and capsules slightly twisted. The geographical relationship between the two new species and their similar species has been discussed.

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Research Article Wed, 26 Aug 2020 20:00:18 +0300
Deinostigma fasciculatum, a new species of Gesneriaceae in Yunnan, China https://phytokeys.pensoft.net/article/32683/ PhytoKeys 157: 199-206

DOI: 10.3897/phytokeys.157.32683

Authors: Yu-Min Shui, Jian-Yong Wu, Zhi-Yong Yu, Shi-Wei Guo, Li Chen, Fang Wen, Wen-Hong Chen

Abstract: A new species of Deinostigma (Gesneriaceae) from Yunnan, China, Deinostigma fasciculatum W.H.Chen & Y.M.Shui, sp. nov., has been discovered and described. In the genus, the new species is similar to D. cicatricosum (W.T. Wang) D.J. Middleton & Mich. Möller and D. cyrtocarpum (D. Fang & L. Zeng) Mich. Möller & H.J. Atkins in dark purple flowers and falcate fruit, but differs from them mainly in the inflorescences with fasciculate flowers, calyx lobes (reflexed, narrowly lanceolate and 1.2–1.3 cm long), corolla tubes (sharply contracted below middle and white outside and below throat). The above three species grow nearby non-limestone wet cliffs and geographically isolated with different distributions (the new species in Southeast Yunnan, D. cicatricosum in Eastern Guangxi and D. cyrtocarpum in Southern Guangxi and Guangdong, China).

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Research Article Wed, 26 Aug 2020 20:00:17 +0300
The taxonomic identity of Didymostigma trichanthera (Gesneriaceae) https://phytokeys.pensoft.net/article/32577/ PhytoKeys 157: 191-197

DOI: 10.3897/phytokeys.157.32577

Authors: Lihua Yang, Chen Feng, Ming Kang, Fang Wen

Abstract: Based on consulting original literature, the examination of specimens, and field investigations, Didymostigma trichanthera is shown to be conspecific with Henckelia anachoreta. Therefore, Didymostigma trichanthera is formally treated as a synonym of Henckelia anachoreta here.

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Research Article Wed, 26 Aug 2020 20:00:16 +0300
Petrocodon wenshanensis, a new species of Gesneriaceae from southwestern China https://phytokeys.pensoft.net/article/39624/ PhytoKeys 157: 183-189

DOI: 10.3897/phytokeys.157.39624

Authors: Zheng-Long Li, Wei-Hua Qin, Fang Wen, De-Ming He, Xin Hong

Abstract: A new species of Petrocodon, P. wenshanensis from Yunnan province of southwestern China, is described and illustrated here. P. wenshanensis morphologically closely resembles P. jingxiensis and P. lithophilus, but differs in vegetative and generative characters. Differences between the new species and others Petrocodon species occurring in Yunnan Province are also shown in the identification key.

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Research Article Wed, 26 Aug 2020 20:00:15 +0300
Petrocodon rubiginosus, a new species of Gesneriaceae from Guangxi, China https://phytokeys.pensoft.net/article/32270/ PhytoKeys 157: 175-181

DOI: 10.3897/phytokeys.157.32270

Authors: Rui-Li Zhang, Shu Li, Stephen Maciejewski, Yi-Gang Wei

Abstract: Petrocodon rubiginosus Y.G. Wei & R.L. Zhang, sp. nov., from Guangxi of South China, is described and illustrated with photographs. The new species is morphologically similar to Pet. hechiensis, but can be easily distinguished by a combination of characters, especially in its petioles, peduncles and pedicels covered with densely ferruginous pilose hairs.

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Research Article Wed, 26 Aug 2020 20:00:14 +0300
Petrocodon luteoflorus (Gesneriaceae), a new species from karst region in Guizhou, China https://phytokeys.pensoft.net/article/32316/ PhytoKeys 157: 167-173

DOI: 10.3897/phytokeys.157.32316

Authors: Zhi-Wei Fan, Lei Cai, Jia-Wen Yang, Sheng-Hu Tang, Fang Wen

Abstract: A new species of Gesneriaceae, Petrocodon luteoflorus Lei Cai & F.Wen was first described and illustrated from Maolan National Nature Reserve, Libo County, Guizhou Province, China. The diagnostic characters and notes of this species between its most morphologically similar species, P. dealbatus Hance, a detailed description, colour photographs, etymology, as well as distribution and habitat, are also provided in this paper.

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Research Article Wed, 26 Aug 2020 20:00:13 +0300
Two new species of Allocheilos (Gesneriaceae) from the karst regions in Yunnan, China https://phytokeys.pensoft.net/article/32729/ PhytoKeys 157: 155-166

DOI: 10.3897/phytokeys.157.32729

Authors: Wen-Hong Chen, Shi-Wei Guo, Jian-Yong Wu, Li Chen, Yu-Min Shui

Abstract: Allocheilos W.T.Wang in Gesneriaceae was described in 1983 and is characterized by its 4-lobed adaxial lip and undivided abaxial lip with acute apex. The genus is endemic to the karst regions in southwestern China and is classified as endangered due to habitat loss. During surveys of the karst areas in Yunnan of southwestern China in 2017, we collected two unknown species of the genus and later confirmed their novelty to science based on the detailed observation of their morphological characteristics, viz. A. maguanensis W.H.Chen & Y.M.Shui and A. rubroglandulosus W.H.Chen & Y.M.Shui. Their relationships with the similar species and provisional conservation status are discussed.

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Research Article Wed, 26 Aug 2020 20:00:12 +0300
Didymocarpus lobulatus (Gesneriaceae), a new species from Zhejiang Province, East China https://phytokeys.pensoft.net/article/30349/ PhytoKeys 157: 145-153

DOI: 10.3897/phytokeys.157.30349

Authors: Wen-Yuan Xie, Jia-Jun Zhou, Xin Hong, Fang Wen

Abstract: Didymocarpus lobulatus, a new species endemic to Zhejiang province, eastern China, is described and illustrated with photographs. The new species is morphologically similar to D. heucherifolius, D. cortusifolius and D. salviiflorus in leaf morphology, but can be easily distinguished by a combination of characters, including the shape of bracts, calyx and calyx lobes.

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Research Article Wed, 26 Aug 2020 20:00:11 +0300
Petrocosmea nanchuanensis (Gesneriaceae), a new species from Chongqing, China https://phytokeys.pensoft.net/article/33625/ PhytoKeys 157: 137-144

DOI: 10.3897/phytokeys.157.33625

Authors: Zhi-Jing Qiu, Jun Zhang, Xavier-Ravi Baskaran, Jin Hu, Zhen-Yu Li, Zheng-Yu Liu

Abstract: A new species, Petrocosmea nanchuanensis Z.Y. Liu, Z.Y. Li & Z.J. Qiu from Mt. Jinfo at Banhe valley of Nanchuan District in Chongqing Municipality (China) is described and illustrated for the first time. Even though this new species is similar to Petrocosmea barbata, it has several significant morphological differences, which includes smaller leaves, repand leaf margin, densely appressed longer pubescences on both surfaces of leaves, larger flower with length of its lower lips about three times longer than that of the upper lips, oblong lower lip lobes, shorter pistil, ovate anthers and styles that are shortly pubescent or approximately glabrous above the middle. The distinct features of P. nanchuanensis and four relative species namely, P. barbata, P. longipedicellata, P. cavaleriei and P. xanthomaculata were also represented in depth. However, P. nanchuanensis is most closely related to P. barbata, based on molecular studies.

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Research Article Wed, 26 Aug 2020 20:00:10 +0300
Oreocharis jasminina (Gesneriaceae), a new species from mountain tops of Hainan Island, South China https://phytokeys.pensoft.net/article/50246/ PhytoKeys 157: 121-135

DOI: 10.3897/phytokeys.157.50246

Authors: Shao-Jun Ling, Shu-Ping Guan, Fang Wen, Yu-Min Shui, Ming-Xun Ren

Abstract: A new species of Gesneriaceae, Oreocharis jasminina S.J.Ling, F.Wen & M.X. Ren from Hainan Island, south China, is highlighted and described. The new species is distinguished by its actinomorphic corolla, narrow floral tube and ovate anthers hidden in the floral tube. The new species also showed clear geographic and altitudinal isolation from the three currently-recognised Oreocharis species on the Island. Molecular phylogenetic analysis, based on nuclear ITS1/2 and plastid trnL-trnF sequences, supported the delimitation of the new species, which forms a single lineage with all the other Oreocharis species from Hainan Island. The roles of geographic and floral isolation in the evolution of the new species and its affinities are discussed.

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Research Article Wed, 26 Aug 2020 20:00:09 +0300
Oreocharis wumengensis, a new species of Gesneriaceae from northeastern Yunnan, China https://phytokeys.pensoft.net/article/33071/ PhytoKeys 157: 113-119

DOI: 10.3897/phytokeys.157.33071

Authors: Lei Cai, Fang-Pu Liu, Xiang-Bo Yi, Zhi-Ling Dao

Abstract: A new species of Gesneriaceae, Oreocharis wumengensis Lei Cai & Z.L.Dao from Wumeng Mountain area, Yanjin County, Yunnan Province, China, is described. The new species is morphologically similar to O. panzhouensis Lei Cai, Y.Guo & F.Wen in the shape of corolla, number of stigma and stamens, but it can be easily distinguished from this species by the leaf shape and indumentum characters of leaf blade, calyx and stamens. Detailed descriptions with photographs of the plant and holotype, and comparisons with morphologically similar species, are also provided.

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Research Article Wed, 26 Aug 2020 20:00:08 +0300
Oreocharis flavovirens, a new species of Gesneriaceae from Southern Gansu Province, China https://phytokeys.pensoft.net/article/31732/ PhytoKeys 157: 101-112

DOI: 10.3897/phytokeys.157.31732

Authors: Wei-Hua Qin, Dong-Dong Ding, Zhong-Lin Li, Yun-Feng Gao, Shu Li, Xin Hong

Abstract: Oreocharis flavovirens is a new species of Gesneriaceae from Gansu, China and is described and illustrated here. It is morphologically similar to O. glandulosa, O. humilis and O. farreri, but those congeners of this new taxon can be distinguished by several salient characters. A description of O. flavovirens, together with illustrations and photos, are presented.

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Research Article Wed, 26 Aug 2020 20:00:07 +0300
Four new species of Oreocharis (Gesneriaceae) in Yunnan province, China https://phytokeys.pensoft.net/article/32284/ PhytoKeys 157: 83-99

DOI: 10.3897/phytokeys.157.32284

Authors: Wen-Hong Chen, Ya-Mei Zhang, De-Ming He, Yong-Liang Li, Yu-Min Shui

Abstract: Four new species of Oreocharis (Gesneriaceae) are described and illustrated. These new species grow in pairs in montane forests in Yunnan province, China. One pair grows in Wenshan county, Southeast Yunnan, viz. Oreocharis eriocarpa W.H. Chen & Y.M. Shui and O. wenshanensis W.H. Chen & Y.M. Shui and another pair grows in Yongde county, Southwest Yunnan, viz. O. fulva W.H. Chen & Y.M. Shui and O. lacerata W.H. Chen & Y.M. Shui. Their morphological and geographical relationship with similar species is discussed and the IUCN endangered status is provided, based on the available data.

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Research Article Wed, 26 Aug 2020 20:00:06 +0300
Genetic delimitation of Oreocharis species from Hainan Island https://phytokeys.pensoft.net/article/32427/ PhytoKeys 157: 59-81

DOI: 10.3897/phytokeys.157.32427

Authors: Shao-Jun Ling, Xin-Ting Qin, Xi-Qiang Song, Li-Na Zhang, Ming-Xun Ren

Abstract: Hainan Island harbours an extraordinary diversity of Gesneriaceae with 14 genera and 23 species, amongst which two species and one variety are recognised in the genus Oreocharis. These three Oreocharis taxa are all Hainan-endemics and show a complex geographical distribution pattern with considerable morphological intermixtures. In this study, we combined DNA (nuclear ITS sequences and cpDNA trnL-trnF and ycf1b) to evaluate genetic delimitation for 12 Oreocharis populations from the island, together with morphological similarity analysis using 16 morphological traits. The results showed Hainan Oreocharis taxa were monophyletic with relative low genetic diversity within populations, highly significant genetic differentiation amongst populations and a significant phylogeographical structure. The 12 populations formed three genetically distinct groups, roughly correspondent to the currently recognised two species and one unknown lineage. The PCA analyses of morphological traits indicate three distinctive groups, differing mainly in petal colour and corolla shapes. The roles of river and mountain isolations in the origin and distribution of these three lineages are discussed.

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Research Article Wed, 26 Aug 2020 20:00:05 +0300
Two new combinations in Oreocharis (Gesneriaceae) based on morphological, molecular and cytological evidence https://phytokeys.pensoft.net/article/32609/ PhytoKeys 157: 43-58

DOI: 10.3897/phytokeys.157.32609

Authors: Li-Hua Yang, Fang Wen, Hang-Hui Kong, Zhi-Xia Sun, Lan-Ying Su, Ming Kang

Abstract: The newly-circumscribed genus Oreocharis is recently enlarged by incorporating ten other genera with high floral diversity. In this study, our morphological, molecular and cytological evidence supports our adding two species from other two different genera (Boeica and Beccarinda) to Oreocharis. The special corolla shape (campanulate or flat-faced) and related short filament of these two new combinations, Oreocharis guileana and O. baolianis, further enrich the diversity of floral characters of the enlarged Oreocharis. Meanwhile, some supplementary and amended descriptions of these two species are made here. Our morphological, molecular and geographical data indicate that O. guileana is related to O. pilosopetiolata to a certain extent. For O. baolianis, however, our current dataset does not allow conclusions on the species relationship within Oreocharis.

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Research Article Wed, 26 Aug 2020 20:00:04 +0300
Reassessment of Bournea Oliver (Gesneriaceae) based on molecular and palynological evidence https://phytokeys.pensoft.net/article/55254/ PhytoKeys 157: 27-41

DOI: 10.3897/phytokeys.157.55254

Authors: Wen-Hong Chen, Ya-Mei Zhang, Shi-Wei Guo, Zhi-Rong Zhang, Li Chen, Yu-Min Shui

Abstract: The former genus Bournea is endemic to China, including two species, has been under consideration for incorporation into the expanded genus Oreocharis s.l. in Gesneriaceae. The phylogenetic tree inferred from two DNA sequences (trnL-F and ITS) showed that this genus is deeply nested into Oreocharis s.l. However, the new tree from seven ones (atpB-rbcL, ndhH-rps15-ycf1, rpl132, trnC-trnD, trnL-F, trnT-trnL of chloroplast DNA and ITS regions) revealed that Bournea is the sister group of other of Oreocharis s.l. Furthermore, Bournea is morphologically different from other Oreocharis based on existing data. We suggest keeping Bournea as an independent genus in Gesneriaceae.

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Research Article Wed, 26 Aug 2020 20:00:03 +0300
Biogeography and evolution of Asian Gesneriaceae based on updated taxonomy https://phytokeys.pensoft.net/article/34032/ PhytoKeys 157: 7-26

DOI: 10.3897/phytokeys.157.34032

Authors: Ke Tan, Tao Lu, Ming-Xun Ren

Abstract: Based on an updated taxonomy of Gesneriaceae, the biogeography and evolution of the Asian Gesneriaceae are outlined and discussed. Most of the Asian Gesneriaceae belongs to Didymocarpoideae, except Titanotrichum was recently moved into Gesnerioideae. Most basal taxa of the Asian Gesneriaceae are found in the Indian subcontinent and Indo-China Peninsula, suggesting Didymocarpoideae might originate in these regions. Four species diversification centers were recognized, i.e. Sino-Vietnam regions, Malay Peninsula, North Borneo and Northwest Yunnan (Hengduan Mountains). The first three regions are dominated by limestone landscapes, while the Northwest Yunnan is well-known for its numerous deep gorges and high mountains. The places with at least 25% species are neoendemics (newly evolved and narrowly endemic) which were determined as evolutionary hotspots, including Hengduan Mountains, boundary areas of Yunnan-Guizhou-Guangxi in Southwest China, North Borneo, Pahang and Terengganu in Malay Peninsula, and mountainous areas in North Thailand, North Sulawesi Island. Finally, the underlying mechanisms for biogeographical patterns and species diversification of the Asian Gesneriaceae are discussed.

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Research Article Wed, 26 Aug 2020 20:00:02 +0300
Paraboea dolomitica (Gesneriaceae), a new species from Guizhou, China https://phytokeys.pensoft.net/article/50933/ PhytoKeys 153: 37-48

DOI: 10.3897/phytokeys.153.50933

Authors: Zhiyou Guo, Zhaowen Wu, Weibin Xu, Zhenyu Li, Xiaoguo Xiang

Abstract: Here we describe Paraboea dolomitica Z.Y. Li, X.G. Xiang & Z.Y. Guo, a new species of Gesneriaceae from Guizhou, China. Based on recent extensive observations, this new species is morphologically similar to Paraboea filipes (Hance) Burtt, in having obovate leaf blades, 1–4-flowered cymes and purplish corolla, but differs from that species by the combination of denticulate leathery leaves, sparsely brown haired peduncles, two woolly bracts, reniform anthers and two glabrous staminodes. Additionally, molecular data support this new species as a member of a clade that includes P. crassifolia, P. tetrabracteata, P. peltifolia, P. vetutina, P. dushanensis, P. dictyoneura, P xiangguiensis and P. guilinensis, but it is distinct from them in leaf position, inflorescence, penduncle, bract and capsule. The conservation status of this species is considered to be “Vulnerable” (VU) according to the IUCN Red List Categories and Criteria.

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Research Article Thu, 16 Jul 2020 09:45:54 +0300
Primulina hochiensis var. ochroleuca (Gesneriaceae), a new variety from a limestone area of Guangxi, China, and errata on five new species of Primulina https://phytokeys.pensoft.net/article/50968/ PhytoKeys 152: 111-120

DOI: 10.3897/phytokeys.152.50968

Authors: Yu-Zhen Ge, Zi-Bing Xin, Long-Fei Fu, Wei-Chuen Chou, Yi Huang, Zhang-Jie Huang, Stephen Maciejewski, Fang Wen

Abstract: Primulina hochiensis var. ochroleuca, a new variety from a limestone hill of karst areas, Guangxi, China is described with color photographs. It resembles P. hochiensis var. hochiensis, P. hochiensis var. ovata and P. hochiensis var. rosulata, but can be easily distinguished by a combination of characteristics, especially by its corolla color. We found only one population with approx. 3000 mature individuals at the type locality. This variety is provisionally assessed as vulnerable [VU C1] using IUCN criteria.

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Research Article Tue, 7 Jul 2020 10:26:13 +0300
Loxostigma puhoatense (Gesneriaceae), a new species from North Central Vietnam https://phytokeys.pensoft.net/article/49473/ PhytoKeys 151: 49-57

DOI: 10.3897/phytokeys.151.49473

Authors: Ngọc-Sâm Lý, Danh-Hùng Nguyễn, Thị-Hương Lê, Minh-Hợi Trần, Ngọc-Đài Đỗ, Bá-Vương Trương, Stephen Maciejewski

Abstract: Loxostigma puhoatense N.D. Do et al., sp. nov., a new species of Gesneriaceae, is described and illustrated from Pu Hoat Nature Reserve, Nghe An Province, Vietnam. This species is morphologically similar to L. dongxingensis and L. damingshanensis in the plant habit, indumentum system of vegetative and reproductive characters, shape of leaf blades, calyx, pistil but differs from the latter two by the abaxially reddish-purple leaf blade with pubescent along veins, lateral veins 11–19, shorter white to pale yellowish-white corolla (3.7–3.8 cm long) with purple-spotted and glabrous inside, longer abaxial stamens in 2–2.1 cm, shorter and densely glandular-puberulent ovary in 1–1.2 cm, and sparsely glandular-puberulent style. Data on distribution, ecology, phenology, and vernacular of the new species are provided.

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Research Article Fri, 12 Jun 2020 14:30:41 +0300