Webbia https://oaj.fupress.net/index.php/webbia <p><strong>Journal of Plant Taxonomy and Geography (<em>Webbia</em>)&nbsp;</strong>is a peer-reviewed journal on Plant Systematics, Nomenclature, Phylogeny, Phytogeography and Paleobotany. Most of the contributions deal with the Vascular Plants, but sometime contributions on Briophytes, Lichenes, Fungi and Algae are encouraged.&nbsp;&nbsp;It aims to allow research in&nbsp;botanical topics such as taxonomy, systematics, speciation, morphometrics, molecular phylogeny, conservation, biogeography, and methods.</p> en-US rbaldo@unifi.it (Riccardo Maria Baldini) alessandro.pierno@unifi.it (Alessandro Pierno) Wed, 16 Nov 2022 19:11:41 +0000 OJS 3.1.2.4 http://blogs.law.harvard.edu/tech/rss 60 Monograph of tribe Sipaneeae (Rubiaceae, Ixoroideae). A Neotropical group with its center of diversity on the Guiana Shield https://oaj.fupress.net/index.php/webbia/article/view/13963 <p class="p1">The tribe Sipaneeae (subfamily Ixoroideae) includes the genera <em>Chalepophyllum</em> (3 spp.), <em>Dendrosipanea</em> (3 spp.), <em>Limnosipanea</em> (3 spp.), <em>Maguireothamnus</em> (3 spp.), <em>Neblinathamnus</em> (2 spp.), <em>Neobertiera</em> (5 spp.), <em>Pteridocalyx</em> (1 sp.), <em>Sipanea</em> (17 spp.), <em>Sipaneopsis</em> (8 spp.), and <em>Steyermarkia</em> (1 sp.), for a total of 44 species. This tribe has its center of diversity on the Guiana Shield (northern South America), where 9 of the 10 genera occur. Only <em>Sipanea </em>and <em>Limnosipanea </em>are also present on the Brazilian Shield and the OrinoquĂ­a Region with a total of 4 species, while <em>Steyermarkia</em>, <em>Sipanea </em>and <em>Limnosipanea </em>are present in Central America with one species each. The genera <em>Sipaneopsis</em>, <em>Chalepophyllum</em>, and <em>Dendrosipanea</em> are endemic to white sand areas of the Amazon Basin. The habit in the tribe Sipaneeae ranges from herbs (terrestrial, amphibian or rarely aquatic), subshrubs, shrubs to treelets. Within the tribe, <em>Chalepophyllum</em>, <em>Dendrosipanea</em>, <em>Neobertiera</em>, <em>Pteridocalyx</em> and <em>Sipanea</em> are heterostylous, while the other genera are homostylous. Several recent articles have been dedicated to the description of new species in this tribe, and only <em>Limnosipanea spruceana</em> var. <em>macrantha</em> is newly described here. In the present work 21 names are newly typified; a list of these names is present at the end of the taxonomic treatment. For all the taxa of this tribe, full synonymy, typification, description, ecological observations, geographic distribution, illustrations, IUCN conservation assessment, and cited specimens are provided.</p> Piero G. Delprete Copyright (c) 2022 Piero G. Delprete https://creativecommons.org/licenses/by/4.0 https://oaj.fupress.net/index.php/webbia/article/view/13963 Wed, 16 Nov 2022 09:00:17 +0000