A phylogeny of the Triraphideae including Habrochloa and Nematopoa

 To investigate the evolutionary relationships among species of the tribe Triraphideae (including two monotypic genera, Habrochloa and Nematopoa ), we generated a phylogeny based on DNA sequences from nuclear ribosomal (ITS) and four plastid markers (rps16-trnK , rps16 intron, rpl32-trnL , and ndhA intron). Habrochloa and Nematopoa form a clade that is sister to Neyraudia and Triraphis . Member of the Triraphideae have paniculate inflorescences, 3-veined, marginally ciliate lemmas, usually with hairy lateral veins, that are apically bifid and awned from between a sinus. A description of the Triraphideae and key to the genera is provided, and the biogeography is discussed, likely originating in Africa. Keywords: Classification, Habrochloa , molecular phylogenetics, Nematopoa , Neyraudia , Triraphideae , Triraphis