%0 Journal Article
%T Taxonomic revision of the tropical African group of Carex subsect. Elatae (sect. Spirostachyae, Cyperaceae)
%A Escudero
%A Marcial
%A Luce£¿o
%A Modesto
%J Anales del Jard¨ªn Bot¨¢nico de Madrid
%D 2011
%I Consejo Superior de Investigaciones Cient¨ªficas
%X The tropical African monophyletic group of Carex subsect. Elatae (sect. Spirostachyae) is distributed in continental tropical Africa, Madagascar, the Mascarene archipelago, and Bioko Island (32 km off the coast of West Africa, in the Gulf of Guinea). The first monographic treatment of this Carex group, as well as of the tribe Cariceae, was published by K¨¹kenthal (as sect. Elatae K¨¹k.). Recently, the first molecular (nrDNA, cpDNA) phylogeny of Carex sect. Elatae has been published, which also included the species of sect. Spirostachyae. In the resulting consensus trees, most species of sect. Elatae were embedded within core Spirostachyae and so this section was joined with sect. Spirostachyae as subsect. Elatae. Within subsect. Elatae, several groups were described, one of which was termed the ¡°tropical African group¡±. Here we present a taxonomic revision of this group, based on more than 280 vouchers from 29 herbaria as well as in field trips in Tropical Africa. In the revision, we recognise 12 species (16 taxa) within the tropical African group, and so have somewhat modified our previous view, in which 10 species, 12 taxa were listed. One new species from Tanzania is included in this treatment, C. uluguruensis Luce o & M. Escudero. Several combinations are made, C. cyrtosaccus is treated as a synonym of C. vallis-rosetto and, finally, the binomial C. greenwayi has been recognised. Las especies de la subsecci¨®n Elatae (secci¨®n Spirostachyae) del g¨¦nero Carex que se distribuyen por ¨¢frica tropical continental, Madagascar, el archipi¨¦lago de las Mascare as y la isla de Bioko (a 32 km del litoral de ¨¢frica occidental, en el golfo de Guinea) forman un grupo monofil¨¦tico. El primer tratamiento taxon¨®mico de este grupo de c¨¢rices, as¨ª como de la tribu Cariceae en su conjunto, fue elaborado por K¨¹kenthal (secci¨®n Elatae K¨¹k.); recientemente, se ha publicado el primer estudio de filogenia molecular (nrDNA, cpDNA) de los t¨¢xones de este grupo, junto con la inmensa mayor¨ªa de las restantes especies que K¨¹kenthal incluy¨® en las secciones Elatae y Spirostachyae. Salvo escasas excepciones, los t¨¢xones incluidos se agruparon en un clado (¡°core Spirostachyae¡±) que contiene las especies de las dos secciones antes aludidas. En congruencia con estos resultados, la secci¨®n Elatae fue incluida en la secci¨®n Spirostachyae como susbsecci¨®n Elatae. Dentro de dicha subsecci¨®n se observaron varios clados; uno de ellos, el denominado ¡°grupo de ¨¢frica tropical¡±, es el objeto del presente trabajo, en el que presentamos una revisi¨®n taxon¨®mica basada en el estudio de m¨¢s de 280 pli
%K Bioko
%K Elatae
%K Carex
%K Cyperaceae
%K Madagascar
%K Mascarene Islands
%K Spirostachyae
%K tropical Africa
%K Bioko
%K Elatae
%K Carex
%K Cyperaceae
%K Madagascar
%K islas Mascare as
%K Spirostachyae
%K ¨¢frica tropical
%U http://rjb.revistas.csic.es/index.php/rjb/article/view/368/362