摘要 : Historically, Pappophoreae included the genera <i>Cottea</i>, <i>Enneapogon</i>, <i>Kaokochloa</i>, <i>Pappophorum</i> and <i>Schmidtia</i>. Some authors consider this tribe as a well-supported monophyletic group; while other evid... 展开 Historically, Pappophoreae included the genera <i>Cottea</i>, <i>Enneapogon</i>, <i>Kaokochloa</i>, <i>Pappophorum</i> and <i>Schmidtia</i>. Some authors consider this tribe as a well-supported monophyletic group; while other evidences reveals Pappophoreae as polyphyletic, with <i>Pappophorum</i> separated from the rest of the tribe. When the latter happens, it can form a clade with <i>Tridens flavus</i>. Molecular phylogenetic analyses of the subfamily Chloridoideae have included few species of Pappophoreae; therefore, further research involving more representatives of this tribe is needed. With the aim of providing new evidence to help clarify the phylogenetic position of <i>Pappophorum</i> and its relationships with other genera of the tribe and the subfamily Chloridoideae, eight new sequences of ITS and <i>trn</i>L-F regions of Pappophoreae species were generated. These sequences were analyzed together with other available sequence data obtained from GenBank, using maximum parsimony and Bayesian inference, for individual (<i>trn</i>L-F or ITS) or combined <i>trn</i>L-F/ITS data sets. All analyses reveal that Pappophoreae is polyphyletic, with <i>Pappophorum</i> separated from the rest of the tribe forming a well-supported clade sister to <i>Tridens flavus</i>. 收起