Phytotaxa https://phytotaxa.mapress.com/pt <p><strong>Phytotaxa </strong>is world's largest journal in botanical taxonomy. </p> en-US <span lang="EN-GB">Authors need to complete and return an </span><span lang="EN-GB"><a href="http://www.mapress.com/phytotaxa/images/copyright.rtf">Assignment of Copyright</a> </span><span lang="EN-GB">form when a paper is accepted for publication. Authors from institutions that do not allow transfer of copyrights to publishers (e.g. government institutions such as USDA, CSIRO) should attach a copyright waiver or similar document.</span> zhangz@landcareresearch.co.nz (Zhi-Qiang Zhang) phytotaxa@mapress.com (Ning L.) Wed, 30 Apr 2025 10:29:12 +1200 OJS 3.3.0.6 http://blogs.law.harvard.edu/tech/rss 60 <strong>Synopsis of the genus <em>Tragus</em> (Poaceae: chloridoideae: cynodonteae) in Peru</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.1 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">A taxonomic synopsis of the genus <em>Tragus</em> for Peru is presented. <em>Tragus peruvianus</em> is described as a new species, while <em>T. australianus</em> and <em>T. racemosus</em> are excluded from the Peruvian agrostological flora. A taxonomic key, morphological descriptions, ecological information, notes, iconography, and reference images are provided.</span></span></span></p> JHON W. MUÑUICO, VICTOR QUIPUSCOA-SILVESTRE, HAROL GUTIÉRREZ Copyright (c) 2025 Phytotaxa https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.1 Wed, 30 Apr 2025 00:00:00 +1200 <strong>Insights from morphological investigations and molecular phylogenetics reveal a new synonymy in <em>Bellevalia</em> (Asparagaceae: Scilloideae) in Iran</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.2 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB"><em>Bellevalia</em></span><span lang="en-GB"> with 19 recognized species in Iran, is an important geophytic genus within the Iranian flora that is poorly understood regarding intraspecific variation in morphological characters, taxonomy, and phylogeny. We initiated morphological analyses of its species using both herbarium specimens and field samples in preparation of a monographic study of this genus. The present paper focuses on the variability of </span><span lang="en-GB"><em>B. decolorans</em></span><span lang="en-GB"> and its relationship with </span><span lang="en-GB"><em>B. shiraziana</em></span><span lang="en-GB">. These two species are generally recognized as distinct, but we find that the morphological differences used to distinguish them—such as broadly ovate leaves, longer pedicels, and varying capsule shapes in </span><span lang="en-GB"><em>B. decolorans</em></span><span lang="en-GB">—are too minor and variable to warrant recognition as distinct species. The differences in capsule and fruit shapes reflect ontogenetic variation within a single species. Our molecular phylogenetic analysis, utilizing nrDNA ITS and cpDNA </span><span lang="en-GB"><em>rps16</em></span><span lang="en-GB"> sequences, confirms the placement of </span><span lang="en-GB"><em>B. shiraziana</em></span><span lang="en-GB"> within sect. </span><span lang="en-GB"><em>Bellevalia</em></span><span lang="en-GB"> and the close relationship to </span><span lang="en-GB"><em>B. decolorans</em></span><span lang="en-GB">. Although sequencing the ITS region proved challenging in </span><span lang="en-GB"><em>Bellevalia</em></span><span lang="en-GB">, the </span><span lang="en-GB"><em>rps16</em></span><span lang="en-GB"> marker appears to be an effective tool for elucidating interspecific relationships within the genus. Ultimately, we conclude that </span><span lang="en-GB"><em>B. shiraziana</em></span><span lang="en-GB"> should be treated as a synonym of </span><span lang="en-GB"><em>B. decolorans</em></span><span lang="en-GB">.</span></span></span></span></p> MOHAMMAD REZA ABDOLLAHI, TIM BӦHNERT, MAXIMILIAN WEIGEND, SHAHIN ZARRE Copyright (c) 2025 Phytotaxa https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.2 Wed, 30 Apr 2025 00:00:00 +1200 <strong>Cytological analysis reveals intraspecific genetic diversity of <em>Begonia handelii </em>(Begoniaceae, sect. <em>Platycentrum</em>)</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.3 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB"><em>Begonia</em></span><span lang="en-GB"> L. is an ideal model for studying plant diversity due to its high species richness and diversity. In this study, we performed detailed cytological analysis for plants collected</span> <span lang="en-GB">from 13 wild populations of </span><span lang="en-GB"><em>Begonia handelii</em></span><span lang="en-GB">, a highly diverse species classified into three varieties. We first determined the chromosome number of these plants and identified diploid, tetraploid, and hexaploid individuals with 2</span><span lang="en-GB"><em>n</em></span><span lang="en-GB">=22, 44, and 66 chromosomes, respectively. Surprisingly, three plants were found to have 2</span><span lang="en-GB"><em>n</em></span><span lang="en-GB">=24 chromosomes. The number and position of both 5S and 45S rDNA in these </span><span lang="en-GB"><em>B. handelii</em></span><span lang="en-GB"> plants were determined using fluorescence </span><span lang="en-GB"><em>in situ</em></span><span lang="en-GB"> hybridization (FISH). The rDNA-FISH analysis revealed that the number of loci for both rDNA types was consistent within each ploidy level, with tetraploid and hexaploid individuals having two and three times the number of loci observed in diploid individuals, respectively. In addition, genomic </span><span lang="en-GB"><em>in situ</em></span><span lang="en-GB"> hybridization (GISH) was used to analyze the genomic relationships among the three varieties and to determine the auto- or allopolyploidy of the polyploid plants. The results suggest that the individuals with 2</span><span lang="en-GB"><em>n</em></span><span lang="en-GB">=24 chromosomes may be hybrids, the tetraploid individuals may be allopolyploids, while hexaploid individuals may be autohexaploids. </span></span></span></span></p> JINYU HU, YAN XIAO, SONGWEI WANG, DAIKE TIAN, YONGHUA HAN Copyright (c) 2025 Phytotaxa https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.3 Wed, 30 Apr 2025 00:00:00 +1200 <strong><em>Bulbophyllum thaithongiae</em> (Orchidaceae), a new species from Thailand</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.4 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span style="color: #030304;">During an exploration for the diversity of orchids in Thong Pha Phum National Park, Kanchanaburi Province, a new species of </span><span style="color: #030304;"><em>Bulbophyllum</em></span><span style="color: #030304;"> in section </span><span style="color: #030304;"><em>Racemosae</em></span><span style="color: #030304;"> was discovered. It is described here as </span><span style="color: #030304;"><em>Bulbophyllum thaithongiae</em></span><span style="color: #030304;">. This new species can be characterized by having sub-densely arranged inflorescences, short floral bracts which never completely hide the flowers and long papillae up to 0.53 mm on the labellum which are clearly visible by naked eye. A detailed description and illustrations are provided together with notes on taxonomy and conservation status.</span></span></span></span></p> NEERANUCH TAOSIRI, TOSAK SEELANAN Copyright (c) 2025 Phytotaxa https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.4 Wed, 30 Apr 2025 00:00:00 +1200 <strong><em>Stropharia daliensis</em> <em>sp. nov.</em> (Strophariaceae, Agaricales) from Yunnan Province, China</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.5 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span style="color: #030304;"><span lang="en-GB"><em>Stropharia</em></span></span> <span lang="en-GB"><em>daliensis</em></span> <span lang="en-GB"><em>sp. nov.</em></span><span lang="en-GB">, collected from Dali, Yunnan, China, is proposed based on morphological and molecular analyses. It is characterized by its viscid to glutinous basidiomata, light reddish-brown to reddish-orange pileus covered with white to light yellow squamules, stipe evanescent annulus in the upper part of the stipe, below the annulus densely covered light yellow triangular squamules, acanthocytes absent. Phylogenetic analysis of the ITS and nrLSU confirmed the phylogenetic placement of the new species. A comprehensive description, line drawings of microstructures, and comparisons with morphologically similar species are provided in this paper.</span></span></span></span></p> YUNLI FENG, YUAN FANG, SHAOXIONG LIU, XIANG GUO, XI LUO, ZHANGHUI GAO, MING MA, RONG HUA, DAFENG SUN Copyright (c) 2025 Phytotaxa https://phytotaxa.mapress.com/pt/article/view/phytotaxa.698.3.5 Wed, 30 Apr 2025 00:00:00 +1200