Phytotaxa <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="">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> (Zhi-Qiang Zhang) (Ning L.) Tue, 17 May 2022 16:12:08 +1200 OJS 60 <p><strong>Taxonomic studies on the genus <em>Reevesia</em> (Malvaceae: Helicteroideae) I: the identities of <em>R. thyrsoidea</em></strong></p> <p>In this study, <em>Reevesia botingensis</em>, <em>R</em>.<em> formosana</em>,<em> R</em>.<em> lancifolia</em>,<em> R</em>.<em> lofouensis</em>,<em> R</em>.<em> longipetiolata</em>,<em> R</em>.<em> macrocarpa</em>,<em> R</em>.<em> parvifolia</em>,<em> R</em>.<em> pycnantha</em>, and <em>R</em>.<em> shangszeensis</em> are recognized as <em>R. thyrsoidea</em> through consulting protologues and herbarium specimens. The present investigation provides complete taxonomic treatments, geographic distributions and ecological observations of <em>R. thyrsoidea</em>. And lectotypes of two names have been designated in this article.</p> HUI-ZHE FENG, KAI-KAI MENG, LONG-YUAN WANG Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong><em>Heteranthera yucatana</em> (Pontederiaceae), a new, threatened species from the Mexican Yucatan Peninsula</strong></p> <p>A new species of <em>Heteranthera </em>(Pontederiaceae), <em>H</em>. <em>yucatana</em>, is described, discussed, and iconographically documented based on material from Yucatan state, Mexico. The species is known from a few small ponds along a narrow strip of dry forests and shrublands over limestone outcrops and derived soils along the northwestern edge of the Yucatan Peninsula. The new species is related and has been hitherto confused with <em>H. seubertiana</em> from eastern Brazil but is easily distinguishable by its substantially smaller habit and flowers. Furthermore, the perianth lobes are lilac with a white-greenish basal blotch with yellowish towards the apex (as opposed to yellow lobes with proximal brownish spots). Also, the two lateral filaments are conspicuously inflated obliquely, as in <em>Heteranthera mexicana</em>, from which it differs by its much smaller vegetative size and some floral characters. The conservation status of the new species is assessed as Endangered according to the IUCN criteria. The genus <em>Heteranthera</em> consists of three species in the Yucatan Peninsula: <em>H. dubia</em>, <em>H. limosa</em>, and <em>H. yucatana</em>. Distributional maps for all <em>Heteranthera </em>from the area covered are presented. Finally, we offer a key to <em>Heteranthera </em>of the area.</p> GERMÁN CARNEVALI, RODRIGO DUNO DE STEFANO, IVÓN M. RAMÍREZ-MORILLO, JOSÉ R. GRANDE ALLENDE, YENI BARRIOS, JOSÉ LUIS TAPIA-MUÑOZ Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong>Myxomycetes diversity in Adana Province (Turkey) with two new records</strong></p> <p>Samples were collected in Adana province during 2019–2021 and myxomycetes were cultured using the moist chamber technique. The samples consisted of rotten or live tree bark, leaves, rashes, vegetable, and animal material, which were considered likely to contain myxomycete spores. In adddition, natural myxomycete samples were collected at nine different stations. These ‘natural samples’ were immediately dried and potential spore-bearing material was kept in a warm and humid environment with the moist chamber technique. In total, 56 myxomycetes (205 samples; 148 by moist chamber technique and 57 ‘natural samples’) were obtained representing six orders, 12 families, 24 genera and 56 species. Eight species were collected only in natural samples, 35 species were obtained only by moist chamber technique in the laboratory, and 13 species were obtained by both methods. Two myxomycetes as new records (<em>Licea rugosa </em>and<em> Physarum nivale</em>) and one new locality (<em>Cribraria lepida</em>) were identified in Turkey</p> HAYRİ BABA, MUSTAFA SEVİNDİK Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong><em>Zeravschania sola</em> (Apiaceae), a new species from Mazandaran Province, Northern Iran</strong></p> <p>A new species, <em>Zeravschania sola </em>(Apiaceae), is described from the Mazandaran Province, Northern Iran. The new species is recognized by molecular phylogenetic analysis of nrITS as closely related to <em>Z. khorasanica</em> and <em>Z. minjanensis</em>. At the same time, it differs from the above-mentioned species in the stem height and diameter at the base, shape of sheaths, leaf blades size, primary and terminal segments of leaves, and umbel size.</p> DMITRY LYSKOV, SHAHIN ZARRE, ELENA TERENTIEVA, TAHIR SAMIGULLIN, EUGENE KLJUYKOV Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong><em>Ruellia scarlatina</em>, a new name for the sixty-year-old but misunderstood <em>Ruellia</em> <em>capitata</em> Rizzini (Acanthaceae)</strong></p> <p>The name<em> Ruellia capitata </em>(Acanthaceae) given by Rizzini to the Brazilian species of the genus <em>Ruellia, </em>is an illegitimate name, as it is a later homonym of <em>R. capitata</em> described by D. Don based on specimens from Nepal in Asia. Therefore a new name, <em>Ruellia scarlatina</em> is proposed here for <em>R. capitata</em>. The detail description along with illustration, distribution map, conservation status, and morphological relationships, are provided. A key for the species of <em>Ruellia</em> with red flowers occurring in Goiás State, as well as coloured photographs of some of them, are also provided.</p> MARCOS JOSÉ DA SILVA Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong><em>Nephoanthus</em> (Melastomataceae: Sonerileae), a new genus segregated from <em>Phyllagathis s.l.</em>, with a new species from Southern Vietnam</strong></p> <p>A new genus,<em> Nephoanthus</em>, is established based on morphological and molecular data. It comprises two species distributed in montane forests of central to southern Vietnam and Hainan Island: the type species <em>N. prostratus</em> and a new species <em>N. nubigenus</em>. <em>Nephoanthus</em> is morphologically similar to <em>Phyllagathis</em> but phylogenetically remote from the type species of <em>Phyllagathis</em> in the analyses of both plastid genome and nrITS sequences. <em>Nephoanthus</em> is genetically associated to but significantly morphologically distinct from<em> Driessenia</em>, <em>Heteroblemma</em>, <em>Medinilla</em> and<em> Tigridiopalma</em>. A detailed morphological comparison of <em>Nephoanthus</em> and related taxa is provided.</p> CHE-WEI LIN, TIAN-CHUAN HSU, HONG TRUONG LUU, TSUNG-YU ALECK YANG, CHIA-WEI LI Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong>Typification issues in <em>Euphorbia</em> section <em>Plagianthae</em> (Euphorbiaceae)</strong></p> <p><em>Euphorbia</em> section <em>Plagianthae</em> contains only two highly distinctive accepted species of Malagasy endemic <em>Euphorbia,</em> restricted to the arid southern part of the island<em>.</em> In this paper we propose an epitype for <em>Euphorbia plagiantha,</em> and a lectotype for <em>Euphorbia fiha</em>, a name designated as a synonym of <em>Euphorbia plagiantha</em>. We also designate a lectotype for <em>Euphorbia</em> <em>salota</em>, and present a distribution map for the section in Madagascar.</p> THOMAS HAEVERMANS, WILBERT L. A. HETTERSCHEID Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong><em>Cirsium lipskyi</em> (Asteraceae) is reinstated for <em>C. interpositum</em>, and <em>C. chrysolepis</em> is a new synonym of <em>C. nishiokae</em></strong></p> <p>Through the examination of specimens (including type materials), we proved that <em>Cirsium chrysolepis</em> is indistinguishable from <em>C. nishiokae</em>, and <em>C. lipskyi</em> is conspecific with <em>C. interpositum</em> and is the legitimate early name for the species. Therefore, we relegate <em>C. chrysolepis </em>to the synonymy of <em>C. nishiokae </em>and <em>C. interpositum </em>to the synonymy of <em>C. lipskyi</em>.</p> ZI-CHAO JIN, YOU-SHENG CHEN Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong><em>Handroanthus abayoy</em>, a new species of Bignoniaceae endemic from Bolivia</strong></p> <p><em>Handroanthus abayoy</em> is a new species endemic to the southern region of the department of Santa Cruz, Bolivia. Morphologically the most similar species to <em>H.</em> <em>abayoy</em> is <em>H. selachidentatus</em>, both species are part of <em>Tabebuia</em> group II according to the classification proposed by Grose &amp; Olmstead (2007). However, the two species have a different geographic distribution, and at least 15 morphological characteristics, both vegetative and reproductive, that distinguish one from the other.</p> DANIEL VILLARROEL, G. ALEXANDER PARADA, MAIRA T. MARTINEZ-UGARTECHE, BENTE B. KLITGAARD Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong><em>Linaria markotchensis</em> (Plantaginaceae), а new species from the Western Caucasus</strong></p> <p><em>Linaria markotchensis</em> (Plantaginaceae), а new species from the Western Caucasus, is described, illustrated and compared with its morphologically closest relatives from <em>L.</em> sect. <em>Linaria</em> (<em>L. altaica</em>, <em>L. biebersteinii</em>, <em>L. macroura</em>, <em>L. odora</em> and<em> L. vulgaris</em>). The new species is different from <em>L.</em> subsect. <em>Laeves</em> (<em>L. altaica</em>, <em>L. macroura</em>, <em>L. odora</em>) by the surface disk of the seed being covered with tubercles and short ridges and therefore should be assigned to <em>L.</em> subsect. <em>Tuberculatae</em>, in which it is distinguished by its habit. The main characters of <em>L. markotchensis</em> are the small size of the shoots; densely arranged alternate leaves, their number and succulence; lack of pubescence, except for some rare, very small glandular trichomes on the inner side of the sepals and corolla; black, shiny, reniform to orbicular-reniform seeds, with a wide black leathery wing; surface disk of the seed covered with tubercles and short ridges.<em> Linaria markotchensis</em> is a narrowly endemic species, growing on marl scree slopes of the Markotkh Ridge, Western Caucasus (Russia, Krasnodar Territory).</p> ANTON V. POPOVICH, ALEXANDER S. ZERNOV Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong>A new name for a <em>Scutellaria</em> (Lamiaceae) endemic to Afghanistan</strong></p> <p>N/A</p> MARC S.M. SOSEF, PIERRE MEERTS Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200 <p><strong><em>Amitostigma kaiyangense</em> (Orchidaceae), a new species from Guizhou, China</strong></p> <p>N/A</p> SHUN-ZHI HE, YONG WANG, WEN-FEN XU Copyright (c) 2022 Phytotaxa Tue, 17 May 2022 00:00:00 +1200