PhytoKeys最新文献

{"title":"A phylogeny of <i>Disakisperma</i> and resurrection of <i>Cypholepis</i> (Poaceae, Chloridoideae, Cynodonteae, Eleusininae).","authors":"Paul M Peterson, Konstantin Romaschenko, Neil Snow, Yolanda Herrera Arrieta","doi":"10.3897/phytokeys.279.203849","DOIUrl":"10.3897/phytokeys.279.203849","url":null,"abstract":"<p><p>The classification of <i>Disakisperma</i> is reevaluated with the study of molecular DNA sequences and morphological characters. We present a phylogeny of four species of <i>Disakisperma</i> utilizing eight plastid (<i>rps3</i>, <i>rps16-trnK</i>, <i>rps16</i> intron, <i>rpoC2</i>, <i>rpl32-trnL</i> spacer, <i>ndhF</i>, <i>ndhA</i> intron, <i>ccsA</i>) and the nuclear ribosomal internal transcribed spacer (ITS) regions investigating 31 species of subtribe Eleusininae, including an increase in the number of DNA markers and sequence data for an additional individual of <i>Disakisperma dubium</i>. We present a revised classification, resurrect <i>Cypholepis</i> with a new generic description for three species, make two new combinations (<i>C. eleusine</i> and <i>C. obtusiflora</i>), and recognize <i>Disakisperma</i> as monotypic with an amended generic description.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"279 ","pages":"1-16"},"PeriodicalIF":1.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13539292/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148888284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Didiclis pseudobisulcata</i> (Selaginellaceae), a new species of the Bisulcata group from northern Thailand and southwest China.","authors":"Sheng-Rong Gong, Yu-Ping Hu, Rossarin Pollawatn, Sahut Chantanaorrapint, Wen Wang, Liang Zhang, Xin-Mao Zhou","doi":"10.3897/phytokeys.278.204624","DOIUrl":"10.3897/phytokeys.278.204624","url":null,"abstract":"<p><p><i>Didiclis pseudobisulcata</i> (Lycopodioidoideae, Selaginellaceae), a new lycophyte species from northern Thailand and southwest China, is described and illustrated. Morphologically, it is similar to <i>D. bisulcata</i> but can be reliably distinguished by its dorsal leaves on branches with an arista often more than 3/4 of the leaf length, the densely ciliolate base of the dorsal sporophyll pteryx, and megaspores with subreticulate exospore ornamentation. Molecular phylogenetic analysis based on ITS and <i>rbcL</i> sequences supports this species as an independent clade. The ITS sequences revealed more than 42 nucleotide differences between the new species and other members of the <i>Bisulcata</i> group, providing clear molecular evidence for its separation from its closest relatives.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"233-246"},"PeriodicalIF":1.6,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13535505/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148881193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum: Fu J, Ma Y, Zhao Z, Chen H, Yin H (2026) <i>Solms-laubachia garzeensis</i> (Brassicaceae), a new species from the Hengduan Mountains of Sichuan Province, China. PhytoKeys 273: 93-107.https://doi.org/10.3897/phytokeys.273.177843.","authors":"Jie Fu, Yu Ma, Zhongyi Zhao, Hongling Chen, Hongxiang Yin","doi":"10.3897/phytokeys.278.202470","DOIUrl":"10.3897/phytokeys.278.202470","url":null,"abstract":"<p><p>[This corrects the article DOI: 10.3897/phytokeys.273.177843.].</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"279-280"},"PeriodicalIF":1.6,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13535507/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148881281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Primula pingwuensis</i> (Primulaceae), a new species in <i>Primula</i> sect. <i>Auganthus</i> from Sichuan, China.","authors":"Si-Yu Zhang, Ming Fang, Ying-Feng Hu, Yang Hu, Jiu-Lin Gu, Zhi-Kun Wu, Jian-Wen Shao","doi":"10.3897/phytokeys.278.204611","DOIUrl":"10.3897/phytokeys.278.204611","url":null,"abstract":"<p><p><i>Primula pingwuensis</i> <b>sp. nov</b>., a new species of <i>Primula</i> sect. <i>Auganthus</i> from Sichuan, China, is described. It resembles <i>P. sinensis</i> in having palmately lobed leaves and multi-whorled inflorescences but differs by its multi-branched stems, more densely short-pubescent surfaces, thicker chartaceous leaves, narrower leaf blades, and indistinct translucent nectar guides. A taxonomic key covering all nine known species of <i>Primula</i> sect. <i>Auganthus</i> is compiled herein to support field morphological discrimination. A chloroplast genome-based phylogeny shows that <i>P. pingwuensis</i> is sister to <i>P. rongrong</i>, and this clade is sister to <i>P. fujiangensis</i>. Incongruence between morphology and molecular phylogeny is observed within the section. Leaf-lobing patterns have undergone multiple independent evolutionary transitions during adaptive radiation in karst habitats, indicating that a few morphological traits cannot be used to reliably infer interspecific relationships. The new species is assessed as Data Deficient (DD) following IUCN criteria, owing to the lack of long-term observations of its threat status and population dynamics. This study provides new data for the taxonomy and evolution of <i>Primula</i> sect. <i>Auganthus</i>.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"247-258"},"PeriodicalIF":1.6,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13535511/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148881215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrastructure of three species of <i>Tryblionella</i> (Bacillariophyceae) found in freshwater habitats in Hunan Province, China, including descriptions of two new species.","authors":"Ya-Lun Ma, Can-Ping Yu, Bing Liu, Patrick Rioual, Yi-Dan Ma, Xiao-Yu Jiang","doi":"10.3897/phytokeys.278.204336","DOIUrl":"10.3897/phytokeys.278.204336","url":null,"abstract":"<p><p>Two diatom samples collected from two freshwater habitats in Hunan Province, China, were studied using light microscopy and scanning electron microscopy. Three <i>Tryblionella</i> species were found; one was identified as <i>T. calida</i> (Grunow) Stroganov et al., and the other two species are established here as new species: <i>T. dongtingensis</i> <b>sp. nov</b>. and <i>T. hunanensis</i> <b>sp. nov</b>. These two new species are morphologically allied to <i>T. calida</i> because they possess the following unique combination of characters: 1) a more or less undulate valve face from side to side; 2) transapical ribs; 3) uniseriate striae with rounded, rimmed inner openings of areolae; 4) a longitudinal row of bar-like ribs connecting the raphe canal wall on both the valve side and the distal mantle side; 5) a marginal ridge; and 6) squat, sometimes apically elongated fibulae. This group around <i>T. calida</i> is different from the group around <i>T. apiculata</i> W. Gregory, which possesses an axial sternum and different stria and areola structures. Additional details of the complex marginal ridges in <i>Tryblionella</i> are revealed and discussed in this paper. Whether the group around <i>T. calida</i> is a monophyletic group and possesses a synapomorphy cannot currently be resolved, and further investigations are needed.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"259-277"},"PeriodicalIF":1.6,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13535501/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148881364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Taxonomic revision of <i>Epipactis</i> Zinn (Orchidaceae) on the Korean Peninsula.","authors":"Jung-Sim Lee, Jee-Yeon Koo, Min-Ha Kim","doi":"10.3897/phytokeys.278.195337","DOIUrl":"https://doi.org/10.3897/phytokeys.278.195337","url":null,"abstract":"<p><p>The genus <i>Epipactis</i> (Orchidaceae) is widely distributed across Europe, Asia, tropical Africa, and North America. In Korea, only <i>Epipactis thunbergii</i> and <i>Epipactis papillosa</i> have traditionally been recognized, and the taxonomy of the genus has not been critically reassessed. Based on examination of protologues, herbarium specimens, and field observations, <i>Epipactis xanthophaea</i>, previously misidentified as <i>E. thunbergii</i>, is confirmed to occur in Korea and is recognized as a distinct species. Accordingly, three species of <i>Epipactis</i> (<i>E. thunbergii</i>, <i>E. xanthophaea</i>, and <i>E. papillosa</i>) are recognized on the Korean Peninsula. Their diagnostic characters and distribution ranges are clarified, and a revised taxonomic treatment is provided.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"205-231"},"PeriodicalIF":1.6,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13525408/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148857572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Brachythecium wangianum</i> (Brachytheciaceae, Bryophyta), a new species from Northern China and Southern Russia.","authors":"Xiao-Tong Peng, Michael S Ignatov, Qian-Nan Gu, Hong-Zhu Liang, Cai-Xia Chen, Yu-Ting Wang, Min Li","doi":"10.3897/phytokeys.278.205832","DOIUrl":"10.3897/phytokeys.278.205832","url":null,"abstract":"<p><p><i>Brachythecium wangianum</i> (Brachytheciaceae), a new moss species from northern China and southern Russia, is described and illustrated. Combining morphological observations and phylogenetic analyses, this study clarifies the systematic placement of Chinese and Russian materials of this taxon, provides a full morphological description, and distinguishes it from other morphologically similar species of <i>Brachythecium</i>. Special attention is paid to comparison with the closely related congeners <i>B. laetum</i> (Brid.) Schimp. and <i>B. boreale</i> Ignatov, as well as the widespread and highly polymorphic <i>B. salebrosum</i> (Hoffm. ex F. Weber & D. Mohr) Schimp. and <i>B. rotaeanum</i> De Not. Phylogenetic analysis based on nrITS sequences strongly supports <i>B. wangianum</i> as a distinct species, sister to <i>B. laetum</i> (Brid.) Schimp. Morphologically, <i>B. wangianum</i> differs from <i>B. laetum</i> in having a longer, more slender leaf acumen, longer median laminal cells, and an autoicous sexual condition. Combined with morphological and phylogenetic evidence, the taxonomic status of <i>B. wangianum</i> is established, and its geographical distribution delineated. Detailed micrographs are also provided. The discovery of this new species enriches the species diversity of <i>Brachythecium</i> in China and Russia, and provides valuable data for future studies on the phylogeny and biogeography of Brachytheciaceae in temperate regions.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"191-204"},"PeriodicalIF":1.6,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13522881/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148851317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Thismia daemona</i> (Thismiaceae), a new species from Thailand supported by morphological and molecular evidence.","authors":"Tosak Seelanan, Isareyakorn Chantapram, Neeranuch Taosiri, Chanachon Chuchuea, Sahut Chantanaorrapint","doi":"10.3897/phytokeys.278.202868","DOIUrl":"10.3897/phytokeys.278.202868","url":null,"abstract":"<p><p>A new species of <i>Thismia</i> from Thailand, <i>T. daemona</i> is described based on morphological characters and molecular phylogenetic analyses. Morphological characters were examined from fresh and spirit materials using a stereo microscope. Phylogenetic analyses were conducted based on three nuclear (SSU, ITS, LSU) and two mitochondrial (<i>atpA</i>, <i>matR</i>) markers. The new species is characterized by coralliform roots, blackish flowers, reddish orange and fleshy outer tepals, inner tepals forming a mitre with three slender claviform appendages, inner surface of floral tube possessing irregular transverse bars in lower half and finely reticulations in upper half, epidermis of transverse bars and reticulations covered with white translucent trichomes, and translucent blue stamens with recurved apex. Phylogenetic analyses support its placement within <i>Thismia</i> sect. <i>Geomitra</i>, with a sister relationship to <i>T. betung-kerihunensis</i>. In addition, the new species is assessed as Critically Endangered according to the IUCN Red List categories and criteria.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"177-189"},"PeriodicalIF":1.6,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13504308/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148819170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rediscovery and reexamination of a declared 'extinct' plant in South China: The species delimitation and conservation implications of <i>Callicarpa oligantha</i> (Lamiaceae).","authors":"Huimin Cai, Qiyi Yang, Yicheng Xu, Tieyao Tu, Zhonghui Ma","doi":"10.3897/phytokeys.278.203604","DOIUrl":"10.3897/phytokeys.278.203604","url":null,"abstract":"<p><p>Accurate species delimitation serves as a cornerstone for effective biodiversity conservation strategies, particularly for rare taxa where misclassification of taxa may lead to misallocation of limited resources. <i>Callicarpa oligantha</i>, one of only two plant species declared extinct in Guangdong Province, South China, was historically documented solely from its type specimen--a single individual collected in 1917 at Luofushan (Loh Fau Mountain). However, the morphological similarities with <i>C. brevipes</i> have long challenged the taxonomic status of <i>C. oligantha</i>. Following the rediscovery of the species at its type locality in 2024, we conducted an integrative taxonomic reassessment of <i>C. oligantha</i> and <i>C. brevipes</i> based on the newly collected materials using combined analyses of molecular phylogenetics and morphological comparisons. Both molecular and morphological evidence congruently support the conspecificity of <i>C. oligantha</i> and <i>C. brevipes</i>. We therefore propose synonymizing <i>C. oligantha</i> under <i>C. brevipes</i> and recommend its exclusion from extinction lists. This study underscores the importance of robust taxonomic frameworks in preventing conservation misprioritization, and highlights the value of integrative, multidisciplinary approaches for establishing accurate biodiversity baselines prior to biological conservation action.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"157-176"},"PeriodicalIF":1.6,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13504310/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148819191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Delimitation of the wild banana <i>Musa acuminata</i> subspecific complex (Musaceae) in Thailand.","authors":"Wandee Inta, Sasivimon Chomchalow Swangpol, Kanokporn Athawongsa, Sirapope Wongniam, Narongsak Sukkaewmanee, Tosak Seelanan, Peerakitt Srikrainoon, Wipawee Nilapaka, Tiwa Rotchanapreeda, Jamorn Somana","doi":"10.3897/phytokeys.278.165557","DOIUrl":"10.3897/phytokeys.278.165557","url":null,"abstract":"<p><p>Thailand, a recognized cradle of diversity for the wild banana <i>Musa acuminata</i>, has long been considered home to four subspecies: <i>siamea</i>, <i>burmannica</i>, <i>malaccensis</i>, and <i>microcarpa</i>. However, recent extensive field surveys across the country have unveiled a more complex picture, necessitating a revision of their taxonomic classification. This study revisits the subspecific classification of <i>M. acuminata</i> in Thailand, reassessing the circumscriptions, descriptions, and distributions of previously recognized subspecies using morphological and biogeographic evidence. The findings reveal a distinct new subspecies, <i>M. acuminata</i> subsp. <i>kraburiensis</i>, located on the Isthmus of Kra. This subspecies is distributed in the transitional zone between <i>M. acuminata</i> subsp. <i>siamea</i> in northern Thailand and <i>M. acuminata</i> subsp. <i>malaccensis</i> in Peninsular Thailand. Furthermore, a northern occurrence of the latter subspecies was recorded, suggesting a potential dispersal route along the Thailand-Myanmar mountain range. Fieldwork revealed additional novel forms within existing subspecies, i.e., a putative mutant form with yellow inflorescence bracts and another form with unusual branching of the inflorescence. Finally, <i>M. acuminata</i> subsp. truncata was recorded for the first time in Thailand. <i>Musa acuminata</i> subsp. <i>burmannica</i>, <i>M. acuminata</i> subsp. <i>burmannicoides</i>, and <i>M. acuminata</i> subsp. <i>microcarpa</i> were not observed during the field survey. Based on the analysis of the <i>M. acuminata</i> subspecies complex in Thailand, the variation is best treated at the subspecies rather than the varietal level. A key for identifying <i>M. acuminata</i> subspecies in Thailand is presented here based on diagnostic characters such as leaf base shape, rachis position, imbrication type, and color of the male bracts.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"278 ","pages":"127-156"},"PeriodicalIF":1.6,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13498946/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148796788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}