DOI: 10.3897/phytokeys.279.192928

Authors: Xiang-Dong Qiu, Jiang-Lin Xia, Feng-Di Zhang, Guo-Ping Wang, Guo-Ping Tan, Yu Xiong, Sheng-Wei Wang, Neng Wei, Qing-Feng Wang

Abstract: Sedum hengshanense, a new species of Crassulaceae from central China, is described and illustrated. Morphological evidence supports its placement in Sedum sect. Sedum. The new species is morphologically similar to S. spiralifolium, S. sarmentosum, S. lineare, S. polytrichoides and S. morrisonense, but differs by its alternate phyllotaxy, leaf apex not twisted when young, papillate leaf margin, longer basal leaf spurs (1.0–1.4 mm long) with an acuminate apex, petals with the apex mucronate at the tip and broadly spatulate to subtrapezoid, obtuse-apexed nectar scales. Phylogenetic analysis recovers S. hengshanense as sister to the clade comprising S. spiralifolium, S. sarmentosum and S. lineare. The species is assessed as Vulnerable (VU) according to the IUCN Red List Categories and Criteria.

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DOI: 10.3897/phytokeys.278.190330

Authors: Sheng-Rong Gong, Jing Zhao, Jian-Rong Zhang, Shi-Feng Liang, Ling-Nan Wei, Xin-Mao Zhou, Jia-Guan Wang

Abstract: Based on comprehensive morphological and molecular data analyses, this study confirms that three populations of Sinocrassula from central Yunnan Province represent two distinct new species, which are described herein as Sinocrassula kunmingensis J.Guan Wang & Jing Zhao and S. chenggongensis J.Guan Wang & Jing Zhao. Morphologically, the two new species are most similar to S. adpressa, S. crassifolia, S. obliquifolia, and S. yongshengensis. However, S. kunmingensis is characterized by its greenish-yellow or red stem leaves without spots, subligulate nectar scales, reddish-purple flowers, ovate-lanceolate bracts, and petals with a slight central protrusion; S. chenggongensis is distinguished by its green stem leaves with purplish-red spots, subligulate nectar scales, pinkish-purple flowers, oblong-elliptic bracts with an oblique apex, and petals without a protrusion. This combination of morphological characters can be clearly distinguished from those of similar species. Phylogenetic analyses further reveal that the two new species form two independent clades with strong support and are sister to each other.

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DOI: 10.3897/phytokeys.276.195585

Authors: Neng Wei, Xiang-Dong Qiu, Qing-Feng Wang

Abstract: Recent phylogenomic studies have consistently shown that Orostachys s.l. is polyphyletic and that the traditional subsections Appendiculatae and Orostachys represent distinct lineages. New generic name, Spinella H.-R. Lee & K.-S. Cheon was proposed to refer to species previously placed in O. subsect. Appendiculatae. We argue that this generic treatment is nomenclaturally incorrect. Orostachys is a conserved name with a conserved type corresponding to O. chlorantha (= O. spinosa), which is placed in subsect. Appendiculatae. Therefore, the name Orostachys must apply to the lineage traditionally treated as subsect. Appendiculatae, not to subsect. Orostachys. Consequently, Spinella is not the correct generic name for species of O. subsect. Appendiculatae, and should be treated as the heterotypic synonym of Orostachys.

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DOI: 10.3897/phytokeys.272.188016

Authors: Zhi-Dan Wang, Xiao-Feng Jin, Yi-Fei Lu

Abstract: Sedum xinchangense (Crassulaceae), a new species from Zhejiang, eastern China, is described with illustrations. The new species is morphologically similar to S. lungtsuanense and S. stellariifolium, but can be distinguished by a combination of morphological characters, including the presence of stolons, leaf and sepal shape, indumentum type, flower number, and leaf and seed size. Phylogenetic analyses also confirmed its distinct species status, placing it within the Acre clade of subfamily Sempervivoideae. Based on both morphological and molecular evidence, we assign the new species to sect. Sedum.

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DOI: 10.3897/phytokeys.268.174287

Authors: Xiao-Wei Yi, Zhi-Yi Xie, Xue-Gui Shen, Wei Xu, Qiu-Gen Zeng, Ke Tang, Yan-Shuang Huang, Qiang Fan

Abstract: This study describes a new species of Sedum (Crassulaceae), Sedum qingyuanense sp. nov. discovered in Qingyuan City, Guangdong Province, China. Morphologically, S. qingyuanense resembles S. alfredii and S. emarginatum. The new species may have previously been misidentified as S. alfredii. However, the new species can be readily distinguished from S. alfredii by its creeping sterile stems, opposite leaves, emarginate leaf apices, and smaller sepals. Compared to S. emarginatum, it is differentiated by its creeping sterile stems, smaller sepals, and conspicuous pseudopetioles. Phylogenetic analysis based on the nuclear ribosomal DNA internal transcribed spacer (ITS) region revealed that the new species forms a sister clade to S. emarginatum within Sedum sect. Sedum, supported by moderate to strong bootstrap support (> 80%). Integrating both morphological evidence and the phylogenetic tree, we establish it as an independent lineage.

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DOI: 10.3897/phytokeys.263.159143

Authors: Xiang-Dong Qiu, Jia-Jing Shi, Ya-Lin Feng, Feng-Di Zhang, Sheng-Wei Wang, Neng Wei, Qing-Feng Wang

Abstract: Sinocrassula cuonaensis, a new species of Crassulaceae from southern Xizang, is described and illustrated based on molecular and morphological evidence. Phylogenetically, it is sister to S. densirosulata with robust support. Morphologically, this new species is similar to S. indica var. viridiflava, S. densirosulata, and S. jiaozishanensis in having glabrous indumentum and long inflorescences, but it can be easily distinguished by its rosulate, thick, and near-cylindrical basal leaves, greenish white flowers, and sub-rectangular nectar scales. A key for identification of the genus, including the new species, is provided.

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DOI: 10.3897/phytokeys.262.159097

Authors: Zi-Lin Feng, Xiao-Wen Liao, Du Deng, Long-Ping Tang, Shi-Yong Meng, Lei Wu

Abstract: We describe and illustrate Sedum shunhuangense, a new species from Hunan, China. The species is morphologically similar to S. alfredii and S. yangjifengensis but differs in having subequal sepals, papillate seeds, and alternate leaves with caducous lower leaves during flowering. Phylogenetic reconstruction strongly supports two accessions of S. shunhuangense as monophyletic and sister to S. lipingense and S. wilsonii. The species has an estimated wild population of 200 individuals and is assessed as Endangered (EN) under IUCN criteria.

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DOI: 10.3897/phytokeys.255.142079

Authors: Rong-Juan Li, Jing Zhao, Shao-Li Fang, Chuan-Jie Huang, Miao Luo, Zhao-Rong He, Xin-Mao Zhou, Jia-Guan Wang

Abstract: Based on a comprehensive morphological and molecular data analysis, we have confirmed and described a new species within the genus Sinocrassula, which is distributed in Sichuan Province, China. Morphologically, the new species resembles Sinocrassula diversifolia and S. indica, but it is distinctly different from them in its asymmetrical leaves, leaf apex with glands, triangular petals that are white at the base and adorned with dense purple-red stripes and spots on the surfaces upward, and rectangular nectar scales. A phylogenetic analysis utilizing four plastid markers and one nuclear marker supports the conclusion that the new species is sister to S. ganluoensis.

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DOI: 10.3897/phytokeys.253.119922

Authors: Jing-Min Dai, Yu Xiong, Pan Li, Yue-Liang Xu, Qiang Fan

Abstract: Sedum orientalichinense, a new species of Crassulaceae from eastern China, is described and illustrated here. Phylogenetic analysis based on the internal transcribed spacer (ITS) region of nrDNA suggests that the new species belongs to S. sect. Sedum sensu Fu and Ohba (2001) in the “Flora of China”, and is sister to S. makinoi with high support values (BS = 100, PP = 1). The new species was previously always misidentified as S. makinoi, S. emarginatum or S. baileyi, due to its opposite leaves. Sedum emarginatum can be easily distinguished by its leaf blades with the apex emarginate in which it differs from the other three species. Sedum orientalichinense usually has 2-branched cymes, unlike S. makinoi which is 2- to 4-branched. The new species further differs from S. makinoi in its obovate to obovate-rhombic leaf blades (vs. obovate to obovate-spatulate in the latter) and has shorter stems (6–18 cm vs. 11–28 cm) with less internodes. It can also be easily distinguished from S. baileyi by its slender to sub-woody suberect stems (vs. slender and erect stems) and larger plant height (6–18 cm vs. 3–7 cm).

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DOI: 10.3897/phytokeys.252.128011

Authors: Chun-Yu Zou, Tao Meng, Shi-Yong Meng, Yan Liu

Abstract: A new species, Sedum guangxiense sp. nov., discovered in Guangxi Province, China, is described and illustrated. Molecular phylogenetic analyses and morphological differences indicate that this species is well separated from its close relatives in Sedum, justifying its recognition as a distinct new species. Morphologically, it closely resembles Sedum tosaense and S. emarginatum in its leaf shape, inflorescence type and life form, but it can be easily distinguished in its erect stems when young, much larger leaves, narrowly triangular petals, ovate nectar scales and oblong anthers.

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DOI: 10.3897/phytokeys.251.134633

Authors: Zhi-Bai Xu, Jing Zhao, Rong-Juan Li, Hong Jiang, Jia-Guan Wang, Chao Chen

Abstract: A new species of crassulacean acid metabolism, Sinocrassula holotricha, is described based on specimen collected from Sichuan Province, Southwest China. The new species can be distinguished from its morphologically and phylogenetically related species by the hairy plants and lack of rosette. In the present study, a molecular phylogeny, taxonomic description, distribution information, and photographs of this new species are presented.

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DOI: 10.3897/phytokeys.251.125595

Authors: Shi-Qi She, Yang Zhang, Xin Zhou, Ya-Jun Peng, Shen-Hao Yao, Xing-Xing Zhao, Jia Yang, Yue-Liang Xu

Abstract: In this paper, Sedum simingshanense sp. nov. is described as a new species based on morphological and molecular analyses, and its taxonomic relationships are discussed. Morphological analysis indicates S. simingshanense should be classified in the genus Sedum sect. Sedum and is distinct from the related species S. xunvense and S. formosanum in the morphology of its solitary, light green and smooth stems, flattened leaves, larger, obovate and spurless sepals, yellow anthers, 22–30 ovules per carpel, oblique follicles, and its habitat on shaded slopes or rocks. Phylogenetic analysis of sequences of the nuclear ribosomal internal transcribed spacer (ITS) also demonstrates that S. simingshanense has a highest similarity of only 97.22% with any known species and S. formosanum is the closest extant relative of the new species.

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DOI: 10.3897/phytokeys.221.97495

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

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

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DOI: 10.3897/phytokeys.212.82604

Authors: Tae-Young Choi, Dong Chan Son, Takashi Shiga, Soo-Rang Lee

Abstract: Phedimus individuals from Mt. Daeam, once referred to as Phedimus sikokianus, exhibit certain morphological characters that are unique within the genus. Phedimus is one of the most notorious groups for taxonomic problems due to the high morphological variation found in leaf shape, stem numbers, phyllotaxis and seed structure. Taxa in Phedimus also easily hybridize, further leading to taxonomic confusion. To carefully confirm the identity of the putative new species from Mt. Daeam, we examined morphological characters from ~100 herbarium sheets of six closely related Phedimus species. A molecular phylogenetic approach was also employed to delimit the species boundary and infer the phylogenetic relationships among the seven Phedimus species, including the species from Mt. Daeam. Both morphological and molecular phylogenetic results indicated that the species found on Mt. Daeam is a new species that is more closely related to P. middendorffianus and P. takesimensis than to the remaining four Phedimus species. Here, we provided a full description of the new species P. daeamensis as well as an updated key for the seven Phedimus species examined.

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DOI: 10.3897/phytokeys.148.48957

Authors: Takuro Ito, Chih-Chieh Yu, Masatsugu Yokota, Goro Kokubugata

Abstract: We re-examined the taxonomic status of plants treated as Sedum formosanum (Crassulaceae) from Miyako-jima Island of the Ryukyu Islands, Japan, using morphological comparison and molecular phylogenetic analyses with related species. In morphology, plants from Miyako-jima Island bore a close resemblance to the other plants of S. formosanum, but differed in being perennial, polycarpic, and having lateral axillary branches. Molecular analyses based on ITS of nrDNA and six regions of cpDNA sequencing indicated that the Miyako-jima plants formed a distinct subclade. This subclade was part of a polytomy with three other subclades comprising nine taxa endemic to Taiwan and S. formosanum from other areas, including the type locality. Therefore, we propose and describe the Miyako-jima plants as a new subspecies, Sedum formosanum subsp. miyakojimense.

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DOI: 10.3897/phytokeys.135.39036

Authors: Yong-In Kim, Jae-Seo Shin, Sangwoo Lee, Jia-Hui Chen, Sangho Choi, Jin Hee Park, Young-Dong Kim

Abstract: This study describes and illustrates Chrysosplenium macrospermum Y.I.Kim & Y.D.Kim, a new plant species from Changbaishan Mt. (Baekdusan Mt.) in northeastern China. The species is most similar to Chrysosplenium valdepilosum in the series Pilosa but is readily distinguishable by short arching sterile branches, multiple (up to 3) flowering stems, and smooth surfaced seeds (without tubercles), which are ca. 30–50% larger than those of other members in the series.

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DOI: 10.3897/phytokeys.134.38287

Authors: Ren-Bo Zhang, Tan Deng, Quan-Li Dou, Lin He, Xin-Yun Lv, Hong Jiang

Abstract: We describe and illustrate Sedum lipingense (Crassulaceae), a new species of stonecrop found in the limestone areas of SE Guizhou, China. Based on the presence of adaxially gibbous carpels and follicles, this taxon belongs to sect. Sedum S.H. Fu. The new species superficially resembles S. subtile Miquel and S. bulbiferum Makino but differs from these two taxa in its development of a basal leaf rosette during florescence. The nrDNA internal transcribed spacer (ITS) sequences also support the claim that this plant is a new species in the Sedum genus.

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DOI: 10.3897/phytokeys.132.35428

Authors: Yu-Bing Wang, Xing-Jun Xiong

Abstract: Sedum ichangensis sp. nov., from Yichang, Hubei province, central China, is described and illustrated. The new species is similar to S. elatinoides and S. rosthornianum in its leaf and carpel morphology and differs in its creeping stems and solitary flowers. The conservation status of S. ichangensis was assessed as Endangered according to the IUCN Red List criteria.

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