Phytotaxa https://phytotaxa.mapress.com/pt <p><strong>Phytotaxa </strong>is world's largest journal in botanical taxonomy. </p> Magnolia press en-US Phytotaxa 1179-3155 <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> <strong>A nomenclatural note on <em>Leobordea</em> (Crotalarieae, Fabaceae)</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.9 <p>N/A</p> J. STEPHEN BOATWRIGHT BEN-ERIK VAN WYK Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 197 198 10.11646/phytotaxa.682.2.9 <strong>Pleurotheciaceae in Philippine freshwater ecosystems: new records, asexual morph report of <em>Phaeoisaria filiformis</em>, and phylogenetic assessment</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.1 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">The study of lignicolous freshwater fungi in the Philippines led to the collection and isolation of two Pleurotheciaceae species, belonging to <em>Rhexoacrodictys </em>and <em>Phaeoisaria</em>. Phylogenetic analysis based on the internal transcribed spacer (ITS), beta-tubulin (TUB2), and RNA polymerase II (RPB2) loci revealed that UPVMI 24-0005 belongs to the taxon <em>Rhexoacrodictys erecta</em>, clustering closely with other strains (HSAUPmyr4622, IFRD500-016, HSAUP myr6489) (100% ML, 1.00 BYPP). UPVMI 24-006 was identified as <em>Phaeoisaria filiformis</em>, grouping with the holotype MFLUCC 18-0214 and KUNCC 23-13723 (90% ML, 1.00 BYPP). The present work also confirmed the first report of the asexual morphic stage of <em>P. filiformis</em>, as previous studies only described its sexual morph. Furthermore, the genus <em>Saprodesmium</em>, typified by <em>S. dematiosporum</em>, was transferred to <em>Rhexoacrodictys </em>based on multi-locus phylogenetic analysis, and the generic description is emended. The newly collected specimens represent novel records of Pleurotheciaceae in Philippine freshwater ecosystems. Detailed descriptions, illustrations, and multi-locus phylogenetic analysis of <em>R. erecta </em>and <em>P. filiformis</em> are provided.</span></span></span></p> JAN FELNESH EXE BAGACAY CARR MARLO CANTO LILCAH ANGELIQUE OPIÑA JAMES ARIEL NIM JASMINE VELO THOMAS ANGELO LOPEZ VICTOR MARCO EMMANUEL N. FERRIOLS RESURRECCION B. SADABA MARK S. CALABON Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 121 137 10.11646/phytotaxa.682.2.1 <strong>Morphology and multigene phylogeny unveil <em>Waltergamsia xishuangbannaensis</em> <em>sp. nov.</em> (Bionectriaceae, Hypocreales), associated with Pará rubber (<em>Hevea </em><em>brasiliensis</em>) from Yunnan Province, China</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.2 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">During a survey of fungi associated with Pará rubber (<em>Hevea brasiliensis</em>) in Xishuangbanna, Yunnan Province, fungal masses that grew on old rubber latex were collected and isolated. Based on DNA sequences of the internal transcribed spacer ribosomal RNA locus (ITS), the nuclear ribosomal large subunit (LSU), partial translation elongation factor 1-alpha (<em>tef</em>1-α), and RNA polymerase II subunit 2 (<em>rpb</em>2) genes, coupled with morphological characteristics, the isolated fungal strains were identified as a novel fungal species, <em>Waltergamsia xishuangbannaensis</em>. A description, illustrations, and phylogenetic analysis results of the new species are presented. In addition, the new species is compared with closely related taxa.</span></span></span></p> RUI-MENG LIU RUI-FANG XU ABDALLAH M. ELGORBAN JIANCHU XU DONG-QIN DAI NAKARIN SUWANNARACH SAMANTHA C. KARUNARATHNA SAOWALUCK TIBPROMMA Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 138 150 10.11646/phytotaxa.682.2.2 <strong><em>Conidiobolus srinivasanii</em> (Conidiobolaceae, Entomophthorales), a novel species from Western Ghats, Maharashtra, India</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.3 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">The genus <em>Conidiobolus</em> represents fungi of ecological and pathological importance, recently undergoing significant taxonomic revisions driven by molecular advancements. This study describes <em>Conidiobolus srinivasanii sp. nov.</em>, a saprobic species isolated from plant litter in Maharashtra, India. Morphological examinations reveal unique features, such as vasiform primary conidiophores, catenate secondary conidia, and multipolar germ tube development, distinguishing it from closely related species. Multigene phylogenetic study (TEF-1α, mtSSU, nucLSU) substantiates its placement within <em>Conidiobolus s.s.</em> while emphasizing genetic divergence from other species. This work integrates morphological observations with genomic data to improve understanding of the taxonomy of this newly described species and underscores the significance of plant litter as a crucial habitat for fungal diversity. These findings aid in the continual refinement of fungal classification and elucidation of the evolutionary complexity of the genus.</span></span></span></p> KADAMBARI S. PAWAR PARAS N. SINGH SANJAY K. SINGH Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 151 160 10.11646/phytotaxa.682.2.3 <strong><em>Samsoniella doupengshanensis, </em>a new species from Guizhou, China</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.4 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">A new species, </span><span lang="en-GB"><em>Samsoniella doupengshanensis, </em></span><span lang="en-GB">isolated from an infected pupa, is introduced. Morphological comparisons and DNA-based phylogenies from analysis of a multigene dataset of combined ITS, LSU, </span><span lang="en-GB"><em>RPB2</em></span><span lang="en-GB"> and </span><span lang="en-GB"><em>TEF</em></span><span lang="en-GB"> sequences support establishment of the new species. It differs from other species by its shorter phialides, smaller ellipsoidal conidia and pupa host.</span></span></span></span></p> QIAN ZENG XU CHEN WAN-HAO CHEN WEI-YI TIAN Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 161 169 10.11646/phytotaxa.682.2.4 <strong>Revisiting the endemic <em>Eugenia grandifolia </em>(Myrtaceae), a rare species from the Brazilian state of Rio de Janeiro: extended description and conservation</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.5 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">This paper documents the rediscovery of <em>Eugenia grandifolia</em>, an endemic species from the Brazilian state of Rio de Janeiro that was primarily known from 19<sup>th</sup> century collections. <em>Eugenia grandifolia </em>is remarkable by its relatively large, subsessile leaves with cordate bases, inflorescences in racemes and often ramiflorous, and fruits with up to seven seeds. We provide herein a second step lectotypification, updated morphological description, notes on taxonomy, distribution, habitat, and phenology of the species. The presence of colleters in the species is first recorded here. Its fruits, previously unknown to science, are illustrated and described herein, and the first photographic documentation of the live plant in its habitat is also presented. Finally, we present a distribution map and a reassessment of the conservation status of <em>E. grandifolia</em>.</span></span></span></p> THIAGO FERNANDES JOÃO MARCELO ALVARENGA BRAGA KARINNE SAMPAIO VALDEMARIN VINÍCIUS LUVIZOTTO DENARDI PABLO VIANY PRIETO FIORELLA F. MAZINE Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 170 178 10.11646/phytotaxa.682.2.5 <strong><em>Rhododendron</em> <em>yuanbaoshanense </em>(Ericaceae), a new species from Guangxi, China</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.6 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">A new species of <em>Rhododendron</em> (Ericaceae) in subgen. <em>Hymenanthes</em>, sect. <em>Ponticum</em>, subsect. <em>Fortunea </em>from Yuanbaoshan, northern Guangxi, China, namely <em>R</em>. <em>yuanbaoshanense</em>, is described and illustrated. The new species is most similar to <em>R</em>. <em>yuefengense </em>and<em> R. orbiculare</em>, but it differs from <em>R. yuefengense</em> by its broader ovate to orbicular leaf blades with a cordate-auriculate base, cylindric petioles, and longer inflorescence rachis. It is distinguished from <em>R. orbiculare</em> in having 8–17-flowered inflorescences with longer rachis, funnelform-campanulate to campanulate corollas that are pink to pale pinkish-purple and sparsely glandular outside, and densely white glandular style.</span></span></span></p> YI-HUI DENG BO PAN TAO DING HONG LIU XUE-LIAN QIN ZI-XIONG HUANG MIN-MIN DENG Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 179 184 10.11646/phytotaxa.682.2.6 <strong>Lectotypification of <em>Gastrodia dyeriana </em>King & Pantl. (Orchidaceae), its threat status assessment as per IUCN guidelines and notes on its first authentic voucher specimen from Arunachal Pradesh, India</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.7 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><em>Gastrodia dyeriana</em> King &amp; Pantling [Orchidaceae-Epidendroideae-Gastrodieae], earlier known as an endemic species in India, was first reported from Sikkim. As part of the ongoing revisionary work on the genus <em>Gastrodia </em>Brown, it has been found that the name <em>G. dyeriana</em> is not typified. Therefore, a lectotype has been selected for the name. Moreover, the species was reported from Arunachal Pradesh earlier, which lacked citation of any authentic voucher specimen. During a recent field survey in Arunachal Pradesh, the species was collected from a different location. A detailed description along with photographic illustration, data on phenology, habitat and updated distribution is provided for easy identification. Conservation status of the species has also been assessed during the present study following the IUCN guidelines.</span></span></span></p> SAYAK CHAKRABORTY SANCHAYITA SENGUPTA OINDRILA CHAKRABORTY DINESH KUMAR AGRAWALA AVISHEK BHATTACHARJEE DEBABRATA MAITY Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 185 191 10.11646/phytotaxa.682.2.7 <strong><em>Diderma laiseae </em>(Didymiaceae, Physarales), a new species of Myxomycetes from Brazil</strong> https://phytotaxa.mapress.com/pt/article/view/phytotaxa.682.2.8 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">We describe a new species, <em>Diderma</em> <em>laiseae</em>, based on detailed morphological analyses. The type material was collected in the field from dead wood and insect remains (coleoptera) within Floresta Nacional de Silvânia, a conservation unit in the Cerrado biome in the state of Goiás, Brazil. <em>D. laiseae</em> is distinguished by its sessile sporophores with prominent, robust transverse and longitudinal ridges that give it a rough appearance, reticular dehiscence caused by the rupture of ridges, and strongly warted spores with irregular lines. We provide a taxonomic description, photographs (optical microscope, stereomicroscope and scanning electron microscope), a comparison with similar species, and a dichotomous key to the species of <em>Diderma </em>occurring in Brazil.</span></span></span></p> IZABEL CRISTINA MOREIRA LUCAS LEONARDO-SILVA SOLANGE XAVIER-SANTOS Copyright (c) 2025 Phytotaxa 2025-01-21 2025-01-21 682 2 192 196 10.11646/phytotaxa.682.2.8