35 research outputs found
Nomenclatural changes resulting from the transfer of tropical African Sarcostemma to Cynanchum (Apocynaceae: Asclepiadoideae)
Cristobalia
Se presenta el tratamiento del gĂ©nero Cristobalia para flora Argentina. Todas las especies son descriptas e ilustradas. Se incluyen nuevas combinaciones.Fil: Keller, Hector Alejandro. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Liede Schumann, S.. University of Bayreuth; Alemani
Funastrum E. Fourn.
Se presenta el tratamiento del gĂ©nero Funastrum para la flora argentina. Las tres especies son descriptas, tipificadas e ilustradas.Fil: Keller, Hector Alejandro. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Liede Schumann, S.. University of Bayreuth; Alemani
A RAPD study of the Sarcostemma group of Cynanchum (Apocynaceae-Asclepiadoideae-Asclepiadeae)
Xysmalobium samoritourei (Apocynaceae: Asclepiadoideae), a new species from the Guinea Highlands of West Africa
Blepharodon crabronum (Apocynaceae: Asclepiadoideae), a new species from the pre-Cambrian serranias of eastern Bolivia
A phylogeny of Urophylleae (Rubiaceae) based on rps16 intron data
This is the first study of phylogenetic relationships within the pantropical group Urophylleae. Previous studies have included few representatives from this group and little is known about its phylogeny. Here we use sequence data from the rps16 intron to address the question where the four genera Temnopteryx, Pentaloncha, Pleiocarpidia, and Poecilocalyx, which have sometimes been classified in this group, belong. By using different outgroups we show that there is conflict regarding the resolution among lineages in Rubioideae, which partly affects the support for relationships within Urophylleae. Urophylleae is shown to consist of two sister groups, one consisting of Old World taxa and one smaller including the New World genera Amphidasya and Raritebe, and as sister of these two groups the African monotypic genus Temnopteryx. Pentaloncha, Pleiocarpidia, and Poecilocalyx all belong in the large Old World clade, which only comprises taxa included in the original circumscription of Urophylleae. Relationships within this group are not completely resolved, but Poecilocalyx is found to be the sister of Stelechantha, and Pleiocarpidia to be the sister of Urophyllum leucophleum. Urophyllum is paraphyletic as it seems to include Maschalocorymbus, Pleiocarpidia, Praravinia, and Pravinaria. It is not clear from the present analysis whether Pauridiantha is monophyletic or not