Phytotaxa 2021-09-23T17:50:18+12:00 Zhi-Qiang Zhang Open Journal Systems <p><strong>Phytotaxa </strong>is world's largest journal in botanical taxonomy. </p> <p><strong>A new species of <em>Gymnopus</em> sect. <em>Androsacei</em> (Omphalotaceae, Agaricales) from China</strong></p> 2021-09-23T12:24:30+12:00 JI-PENG LI BIN SONG ZHAN FENG JING WANG CHUN-YING DENG YI-HUA YANG <p>A new species of <em>Gymnopus</em> sect. <em>Androsacei</em>, namely, <em>G. pallipes</em> is described and illustrated based on morphological and molecular phylogenetic evidence. It is characterized by marasmioid basidiomata, a dark brown to reddish brown pileus becoming dull white to yellowish grey with age, whitish to pale yellow stipe and presence of rhizomorphs. Phylogenetic analyses support it as a new species within <em>Gymnopus </em>sect. <em>Androsacei</em>. The detailed morphological description, colour photos of basidiomata, and line drawings of microcharacters are presented and delimitation characters from similar species are discussed. A key to the known species of <em>Gymnopus s. str.</em> from China is also provided.</p> 2021-09-23T00:00:00+12:00 Copyright (c) 2021 Phytotaxa <p><strong>Distinctive morphological characteristics of <em>Fucus guiryi</em> (Fucales, Phaeophyceae) from Canary Islands, subtropical eastern Atlantic Ocean</strong></p> 2021-09-23T12:24:32+12:00 MARCOS A. RUIZ-MEDINA ÁGUEDA M. GONZÁLEZ-RODRÍGUEZ MARTA SANSÓN <p>The brown macroalgae in the order Fucales include foundation species on rocky habitats of temperate regions. This work focused on <em>Fucus guiryi</em>, a recently described species segregated from <em>F. spiralis</em> in a molecular basis. It inhabits the upper intertidal zone from the eastern North Atlantic to the subtropical Canary Islands, where is considered its southern limit. We examined morphology and anatomy of vegetative and reproductive structures of <em>F. guiryi </em>from the Canary Islands. Several distinctive characteristics in habit existed between <em>F. guiryi</em> and other species of the genus distributed northwards, such as length and width of stipe and branches, number of branches, and morphology and number of receptacles. Anatomical features reported here for the first time exhibited subtle differences with temperate <em>F. vesiculosus, F. spiralis</em> and <em>F. serratus</em>. The morphology and arrangement of medulla, cortex and meristoderm were also distinctive for <em>F. guiryi</em>. Mucilage in cellular interstitial spaces constitutes good evidence that explains the presence of <em>F. guiryi</em> at its warmest distribution limit in the Canary Islands.</p> 2021-09-23T00:00:00+12:00 Copyright (c) 2021 Phytotaxa <p><strong><em>Rumohra ponceana</em> (Polypodiales: Dryopteridaceae): a new species from Pampean biogeographic province in Argentina</strong></p> 2021-09-23T12:24:34+12:00 MARCELO D. ARANA MARÍA LUJÁN LUNA PEDRO C. BERRUETA MARÍA LUZ MARTINENCO GABRIELA E. GIUDICE <p>The fern <em>Rumohra ponceana</em> <em>sp. nov.</em>, a narrow endemic of the Austral Pampean district, Pampean biogeographic province in Argentina, is described and illustrated. The species inhabits the Tandilia and Ventania Systems, where it grows in sunny rock crevices. The new species differs from the widespread <em>R. adiantiformis</em> (<em>sensu lato</em>) by the reduced size of all parts of the sporophyte and conspicuous capitate glandular hairs at the margins of petiole and rhizome scales. Also, there are significant differences in the architecture of the laminae, the colour and size of the spores and the ornamentation of the perispore, which is folded in <em>R. ponceana</em> and projects in irregular tubercles throughout its surface.</p> 2021-09-23T00:00:00+12:00 Copyright (c) 2021 Phytotaxa <p><strong>A NEW SPECIES OF <em>DICHAEA</em> (ORCHIDACEAE: ZYGOPETALINAE) FROM THE ANDES OF COLOMBIA</strong></p> 2021-09-23T12:24:36+12:00 YASMIN A. ALOMÍA AURELIEN SAMBIN J. TUPAC OTERO PABLO R. STEVENSON <p>A new species of <em>Dichaea</em> sect. <em>Dichaea</em> from the Andean forests in Colombia is described and illustrated based on living material. <em>Dichaea andina</em> is compared with the morphologically similar <em>D. lagotis</em> and <em>D. pendula</em>, from which it can be distinguished by a number of vegetative and floral and features. <em>Dichaea andina</em> differs from <em>D. lagotis</em> in the broadly anchoriform lip, the hypochile transversely subrounded and the epichile transversely narrowly elliptic, briefly apiculate. Similarly, it differs from <em>D. pendula</em> in the caespitose habit, the leaves without cross-venation, and the inflorescence straight produced below the foliage, among other features. Ecological information for the new species is also provided.</p> 2021-09-23T00:00:00+12:00 Copyright (c) 2021 Phytotaxa <p><strong>A New Species of <em>Adesmia</em> (Leguminosae, Papilionoideae, Dalbergieae) from Southern Brazil, with Notes on Leaf Anatomy </strong></p> 2021-09-23T12:24:37+12:00 THIAGO COBRA E MONTEIRO JOÃO RICARDO VIEIRA IGANCI DIANA PACHECO SEIXAS TATIANE MARIA RODRIGUES ANA PAULA FORTUNA-PEREZ <p>A revisional taxonomic study of <em>Adesmia</em> subg. <em>Adesmia</em> ser. <em>Bicolores</em> has unveiled a new species from southern Brazil. <em>Adesmia miottoae</em> is described and illustrated here. Its geographic distribution, phenology, conservation status and morphological similarities with its closest relatives, <em>Adesmia punctata </em>and <em>A. incana</em>, are presented<em>. </em>The species is distinguished by glandular trichomes covering all the aerial parts of the plant, except the corolla. These trichomes are shorter than those of <em>Adesmia punctata. </em>Additionally, a detailed anatomical description of the leaflet blade is provided.</p> 2021-09-23T00:00:00+12:00 Copyright (c) 2021 Phytotaxa <p><strong>Effective typification of <em>Ophrys apifera</em> (Orchidaceae; Orchidoideae)</strong></p> 2021-09-23T12:24:39+12:00 P. PABLO FERRER-GALLEGO <p><em>Ophrys apifera</em> Hudson was previously considered to have been lectotypified by Künkele and Baumann in 1998 with an illustration published by Matthias Lobel in 1581. However, Hudson did not include any references to Lobel in the protologue. Therefore, the typification by Künkele and Baumann is here briefly discussed and superseded because is being contrary to Art. 9.3 of the <em>International code of nomenclature for algae, fungi, and plants </em>(Shenzhen Code). The name is lectotypified here with an illustration published by Bauhin and Cherler in 1651. Unfortunately, this illustration does not show several diagnostic characters to distinguish <em>O. apifera </em>from other related species. Therefore, for a precise circumscription of the name, an epitype is proposed of a complete specimen preserved at K.</p> 2021-09-23T00:00:00+12:00 Copyright (c) 2021 Phytotaxa <p><strong><em>Rigiolepis argentii</em> (Ericaceae): a new species from Sulawesi, Indonesia</strong></p> 2021-09-23T12:24:41+12:00 WENDY ACHMMAD MUSTAQIM WISNU HANDOYO ARDI <p>A new species of <em>Rigiolepis </em>(Ericaceae) from the island of Sulawesi, <em>R. argentii</em> Mustaqim &amp; Ardi, is described. The new species is known from three locations, two in Sulawesi Selatan Province (Mount Sesean in Toraja Utara Regency and Eran Batu in Enrekang Regency) and one in Sulawesi Barat Province (Mamasa Regency). This species is similar to <em>R. moultonii </em>(Merr.) J.J. Sm., but differs by the persistent hairs on the abaxial surfaces of the leaves, the basal marginal glands in a shorter distance (1–2 mm) to from the petiole, bracteoles borne on the lower half of the pedicels, cup-shaped calyx tube, longer filaments (2 mm), and cupular fruits.</p> 2021-09-23T00:00:00+12:00 Copyright (c) 2021 Phytotaxa <p><strong>Zhao, F., Min, D.Z., Xiang, C.L., Chen, B., Zhou, X.X., Liu, B. &amp; Li, B. (2021) Morphological evidence for the conspecific status of the rediscovered <em>Mimulicalyx rosulatus</em> and <em>M. paludigenus</em>. <em>Phytotaxa</em> 520 (1):106–112.</strong></p> 2021-09-23T12:24:42+12:00 FEI ZHAO DAO-ZHANG MIN CHUN-LEI XIANG BIN CHEN XIN-XIN ZHOU BING LIU BO LI <p>N/A</p> 2021-09-23T00:00:00+12:00 Copyright (c) 2021 Phytotaxa