PhytoKeys最新文献

{"title":"<i>Sideritiscarpetana</i> (Labiatae), a new high-mountain Mediterranean species from the marble outcrops of the Sierra de Guadarrama (Central System, Madrid, Segovia, Spain).","authors":"Jose Luis Izquierdo, Rosina Magaña Ugarte, Alba Gutiérrez-Girón, Concepción Obón de Castro, Diego Rivera Núñez, Rosario G Gavilán","doi":"10.3897/phytokeys.251.129982","DOIUrl":"10.3897/phytokeys.251.129982","url":null,"abstract":"<p><p>A new species of <i>Sideritis</i> (<i>Sideritiscarpetana</i>) is described from the calcareous, high-mountain Spanish flora in the central part of the Iberian Peninsula. It is found in a Mediterranean climate at high-elevation, perennial, calcareous grasslands, as well as in marble screes of anthropogenic origin in the Sierra de Guadarrama, Central System (Spain), in a reserve area within the Sierra de Guadarrama National Park, at 1996 m asl. Taxonomic morphological measurements were performed on collected specimens from Sierra de Guadarrama as well as on geographically-adjacent <i>Sideritis</i> (i.e., <i>S.glacialis</i>, <i>S.pungens</i>, <i>S.hyssopifolia</i>). The relationships among them were then explored with multivariate analysis. <i>Sideritiscarpetana</i> is a dwarf shrub with an erect or decumbent habit, growing up to 15 cm; non-woody twigs with long hairs of 3-4 cells, leaves are entire, linear-oblanceolate, sparsely covered with trichomes; inflorescence is spiciform or slightly verticillated, flowers are yellow and nutlets ovoid. A key is supplied to help distinguish it from other high-mountain Iberian species included in sectionSideritis. The species is unique in its combination of morphological and autoecological characters. <i>S.carpetana</i> shares similarities with <i>S.glacialis</i>, a species from Sierra Nevada, and its northern Mediterranean variant, S.glacialissubsp.fontqueriana from Sierra de Gúdar. They share morphological characters that are absent in other high-mountain <i>Sideritis</i>, reinforcing their Mediterranean character, as opposed to a more temperate or submediterranean character, such as those of the <i>hyssopifolia</i> group.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"251 ","pages":"143-159"},"PeriodicalIF":1.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11759922/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047464","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":"Maximising informativeness for target capture-based phylogenomics in <i>Erica</i> (Ericaceae).","authors":"Seth D Musker, Nicolai M Nürk, Michael D Pirie","doi":"10.3897/phytokeys.251.136373","DOIUrl":"10.3897/phytokeys.251.136373","url":null,"abstract":"<p><p>Plant phylogenetics has been revolutionised in the genomic era, with target capture acting as the primary workhorse of most recent research in the new field of phylogenomics. Target capture (aka Hyb-Seq) allows researchers to sequence hundreds of genomic regions (loci) of their choosing, at relatively low cost per sample, from which to derive phylogenetically informative data. Although this highly flexible and widely applicable method has rightly earned its place as the field's <i>de facto</i> standard, it does not come without its challenges. In particular, users have to specify which loci to sequence-a surprisingly difficult task, especially when working with non-model groups, as it requires pre-existing genomic resources in the form of assembled genomes and/or transcriptomes. In the absence of taxon-specific genomic resources, target sets exist that are designed to work across broad taxonomic scales. However, the highly conserved loci that they target may lack informativeness for difficult phylogenetic problems, such as that presented by the rapid radiation of <i>Erica</i> in southern Africa. We designed a target set for <i>Erica</i> phylogenomics intended to maximise informativeness and minimise paralogy while maintaining universality by including genes from the widely used Angiosperms353 set. Comprising just over 300 genes, the targets had excellent recovery rates in roughly 90 <i>Erica</i> species as well as outgroups from <i>Calluna</i>, <i>Daboecia</i>, and <i>Rhododendron</i>, and had high information content as measured by parsimony informative sites and Quartet Internode Resolution Probability (QIRP) at shallow nodes. Notably, QIRP was positively correlated with intron content, while including introns in targets-rather than recovering them via exon-flanking \"bycatch\"-substantially improved intron recovery. Overall, our results show the value of building a custom target set, and we provide a suite of open-source tools that can be used to replicate our approach in other groups (https://github.com/SethMusker/TargetVet).</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"251 ","pages":"87-118"},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11758362/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047472","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":"Morphometric parameters of seeds as a practical method for identifying rare species of the genus <i>Tulipa</i> L. (Liliaceae) from East Kazakhstan region.","authors":"Aidar A Sumbembayev, Olga Lagus, Alevtina N Danilova, Agnieszka Rewicz, Sławomir Nowak","doi":"10.3897/phytokeys.251.133890","DOIUrl":"10.3897/phytokeys.251.133890","url":null,"abstract":"<p><p>The genus <i>Tulipa</i> includes some of the most important ornamental plants. The aim of this work was to study the seed morphology of <i>Tulipa</i> species from East Kazakhstan, including seed coat structure. An analysis focused on five taxa from various natural environmental conditions. A total of 31 tulip populations were studied to establish morphological variability. Preliminary analyses of the importance of habitat-related ecological factors have been carried out. The results of this study provide new qualitative characteristics for distinguishing closely related species and are discussed in relation to their systematic relationships. The structure of the seed coat was studied by Scanning Electron Microscopy; however, the results did not show significant variability. An identification key to determine the species of tulips in East Kazakhstan is proposed.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"251 ","pages":"67-86"},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11758096/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047479","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":"Investigating a hybrid mixed population leads to recognizing a new species of <i>Arctostaphylos</i> (Ericaceae).","authors":"Tito Abbo, Morgan A Stickrod, Alexander Krohn, V Thomas Parker, Michael C Vasey, William Waycott, Amy Litt","doi":"10.3897/phytokeys.251.139172","DOIUrl":"10.3897/phytokeys.251.139172","url":null,"abstract":"<p><p>While investigating the potential for <i>Arctostaphylos</i> species to hybridize in the mixed populations of Point Sal and Burton Mesa in Santa Barbara County, California, we discovered that <i>Arctostaphylos</i> from the Nipomo Mesa (San Luis Obispo County), formerly considered a northern population of <i>A.rudis</i>, are genetically and morphologically distinct. We name this new taxon <i>A.nipumu</i> after the ytt (Northern Chumash language) word for the Nipomo Mesa region. For morphological and molecular analyses, we sampled 54 plants, focusing on <i>A.purissima</i>, <i>A.rudis</i>, and <i>A.crustacea</i> from multiple species and comparative single species populations. Parametric and nonparametric clustering analyses (STRUCTURE and PCA) of ddRADseq data show that <i>Arctostaphylos</i> from the Nipomo Mesa segregate from all other samples in the dataset. In mixed populations <i>A.purissima</i> and <i>A.crustacea</i> samples cluster with samples from other unmixed populations of the same species but <i>A.rudis</i> samples form two distinct clusters. One is composed of the mixed populations in Santa Barbara County, and the other consists of the Nipomo Mesa population. Additionally, the Santa Barbara County <i>A.rudis</i> samples are admixed in STRUCTURE analysis unlike the samples from the Nipomo Mesa. A principal component analysis of eight morphological characters shows that <i>A.rudis</i> individuals from Santa Barbara County tend to be phenotypically variable, occurring in a wide morphological cluster that overlaps with the tight clusters formed by <i>A.purissima</i>, <i>A.crustacea</i>, and <i>Arctostaphylos</i> from the Nipomo Mesa. Based on this evidence we describe the Nipomo Mesapopulation as a new species of <i>Arctostaphylos</i>. Given its limited and fragmented distribution we believe that <i>A.nipumu</i> is of critical conservation concern.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"251 ","pages":"119-142"},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11758095/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047468","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":"Phylogenomics and a new classification of the tropical genus <i>Heliconia</i> L. (Monocots, Zingiberales, Heliconiaceae).","authors":"W John Kress, Tomáš Fér, Mónica M Carlsen","doi":"10.3897/phytokeys.251.130409","DOIUrl":"10.3897/phytokeys.251.130409","url":null,"abstract":"<p><p>Members of the genus <i>Heliconia</i> L. (Heliconiaceae) have evolved complex interactions with both insect herbivores and hummingbird pollinators in tropical forests and secondary growth where they are abundant and diverse. Many of these same species have also been cultivated as ornamentals around the world for hundreds of years because of their extraordinary colors and forms. Because of the large size, fleshy nature, and tropical distribution, and despite a long taxonomic history, the classification and phylogenetic relationships of species of <i>Heliconia</i> have not received sufficient attention to date. No complete classification has been published for the entire genus, although some preliminary attempts have been offered. In this paper we used tissue sampled from field and herbarium collections of 136 species for genomic sequencing to determine the phylogenetic patterns within <i>Heliconia</i>, which then served as the basis for a new evolutionary classification of the genus. This new classification, which is based on extensive field work and the phylogenomic insights provided here, includes 187 currently recognized species. The new classification of <i>Heliconia</i> is composed of 17 sections in five subgenera with all groups well-supported in the phylogenomic analysis. Four subgenera are each composed of two sections and one subgenus includes nine sections. One subgenus and 10 sections are described as new.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"251 ","pages":"37-66"},"PeriodicalIF":1.3,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11747779/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009854","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>Sedumsimingshanense</i> (Crassulaceae), a new species from Zhejiang, East China.","authors":"Shi-Qi She, Yang Zhang, Xin Zhou, Ya-Jun Peng, Shen-Hao Yao, Xing-Xing Zhao, Jia Yang, Yue-Liang Xu","doi":"10.3897/phytokeys.251.125595","DOIUrl":"10.3897/phytokeys.251.125595","url":null,"abstract":"<p><p>In this paper, <i>Sedumsimingshanense</i> <b>sp. nov.</b> is described as a new species based on morphological and molecular analyses, and its taxonomic relationships are discussed. Morphological analysis indicates <i>S.simingshanense</i> should be classified in the genus Sedumsect.Sedum and is distinct from the related species <i>S.xunvense</i> and <i>S.formosanum</i> 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 <i>S.simingshanense</i> has a highest similarity of only 97.22% with any known species and <i>S.formosanum</i> is the closest extant relative of the new species.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"251 ","pages":"23-35"},"PeriodicalIF":1.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11742097/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009853","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>Polygalaspatulata</i> (sect. <i>Pseudosemeiocardium</i>, Polygalaceae), a new species from Guangxi, China.","authors":"You Nong, Run-Hua Jiang, Qi-Min Hu, Xin-Cheng Qu, Xu-Chuan Gui, Gui-Yuan Wei, Li-Qun Lei","doi":"10.3897/phytokeys.251.139955","DOIUrl":"https://doi.org/10.3897/phytokeys.251.139955","url":null,"abstract":"<p><p><i>Polygalaspatulata</i> Y. Nong & Run Hua Jiang (sect. Pseudosemeiocardium, Polygalaceae), a new species from a karst cave in west Guangxi, China, is described and illustrated. This new species resembles <i>Polygalaisocarpa</i> Chodat in its annual habit, terminal racemes, lamellate appendage, yellow flowers and glabrous seeds, but it can be easily distinguished by its sparsely white-pilose stem and leaf blades, spoon-shaped inner sepals, ovate outer sepals (ca. 1.5 mm) which is glandular and all persistent after anthesis, as well as its elliptic, reticulate seeds. Photographs, an illustration, a distribution map and a comparative table with the most similar species are also provided.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"251 ","pages":"13-21"},"PeriodicalIF":1.3,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11730085/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009851","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>Primulinaxingyiensis</i> (Gesneriaceae), a new species in the karst landforms of Guizhou Province, China.","authors":"Jiang-Miao Gu, Song-Tao He, Fang Wen, Xin-Xiang Bai, Mei-Jun Li","doi":"10.3897/phytokeys.251.135126","DOIUrl":"10.3897/phytokeys.251.135126","url":null,"abstract":"<p><p><i>Primulinaxingyiensis</i> X.X.Bai & F.Wen, a new species of Gesneriaceae in the karst landforms of Xingyi City, Guizhou Province, China, is described and illustrated. Morphologically, the species is similar to <i>P.davidioides</i> on corolla, while it is distinguished from <i>P.davidioides</i> by characteristics of thinner and smaller leaves, shorter peduncles, fewer flowers, smaller corolla, glabrous staminodes, and ovary shorter than style. Molecular phylogenetic analysis based on the combined dataset of <i>rpl</i>32-<i>trn</i>L, <i>trn</i>L-<i>trn</i>F, <i>atp</i>B-<i>rbc</i>L, and ITS sequences of the new species and 151 other species of <i>Primulina</i> Hance showed that the two populations of <i>P.xingyiensis</i> clustered into a clade, while it was most closely related to <i>P.malingheensis</i>. Following criteria D1 in the IUCN Red List Categories and Criteria, the new species should be assessed as 'vulnerable' (VU).</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"251 ","pages":"1-12"},"PeriodicalIF":1.3,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11729595/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009852","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>Melicopeiolensis</i> (Rutaceae), a new tree species from Kaua'i, Hawaiian Islands.","authors":"Kenneth R Wood, David H Lorence, Warren L Wagner, Marc S Appelhans","doi":"10.3897/phytokeys.250.128963","DOIUrl":"https://doi.org/10.3897/phytokeys.250.128963","url":null,"abstract":"<p><p>A newly-discovered endemic tree species of <i>Melicope</i> from Kaua'i, Hawaiian Islands, is described and illustrated with notes on its distribution, ecology, conservation status and phylogenetic placement. A modification to the existing key to Hawaiian <i>Melicope</i> is also provided. <i>Melicopeiolensis</i> <b>sp. nov.</b> is a member of Stone's <i>Megacarpa</i> group having carpels connate at base, capsules 4-lobed and leaves usually opposite. The new species differs from its Hawaiian congeners by its unique combination of abaxially glabrate to pilose-pubescent leaves with petioles up to 70 mm long, ramiflorous and axillary inflorescences, sepals on staminate flowers 0.3-0.5 mm long, capsules with green and purple streaking, 10-14 mm wide and seeds 3-3.5 mm long. Since its discovery in 2021, 15 individuals have been documented within a single remote windward hanging valley below the Kawaikini Summit of Kaua'i. <i>Melicopeiolensis</i> represents a new Critically Endangered (CR) single island endemic species in need of conservation.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"250 ","pages":"237-249"},"PeriodicalIF":1.3,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11707518/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142953120","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>Microtoenawawushanensis</i> (Lamiaceae, Lamioideae): A new species from Sichuan, China.","authors":"Xue-Xue Wu, Yan Wang, Yan-Yi Chen, Qiang Wang","doi":"10.3897/phytokeys.250.139362","DOIUrl":"https://doi.org/10.3897/phytokeys.250.139362","url":null,"abstract":"<p><p><i>Microtoenawawushanensis</i>, a new species from Sichuan, China, is described and illustrated here. The new species is closely related to <i>M.moupinensis</i> and <i>M.prainiana</i>, but differs distinctly from both in leaf, calyx and bract morphology. It is further distinguished by its highly variable and unstable calyx tooth ratio (1.36-2.13), red-marked lateral lobes on the lower corolla and filaments that are barbate at both the upper and basal parts, with nearly imperceptible hairs in the middle section. Phylogenetic analyses, based on 81 coding regions of the chloroplast genome, suggest that <i>M.wawushanensis</i> belongs to sect. Delavayana and is sister to a clade formed by <i>M.urticifolia</i>, <i>M.prainiana</i> and <i>M.megacalyx</i>.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"250 ","pages":"223-236"},"PeriodicalIF":1.3,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11704741/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142953124","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}