东川铁线莲,云南毛茛科一新种

Clematis dongchuanensis,a new species of Ranunculaceae from Yunnan

描述了自云南东北部发现的毛茛科铁线莲属一新种,东川铁线莲。此种由于其叶为单叶,萼片直立,雄蕊的花丝和花药均被短柔毛而与曲柄铁线莲近缘,与后者的区别在于其叶呈心状卵形,叶缘具粗牙齿,花序为二歧聚伞花序,以及花药顶端钝,不具短尖头。

A species of the genus Clematis（Ranunculaceae）,C.dongchuanensis,is described as new from northeastern Yunnan.In having simple leaves,erect sepals and puberulous filaments and anthers of stamens this species is related to C.repens Finet Gagnep.,and from the latter differs in its cordate-ovate and coarsely dentate leaves,dichotomous cymes,and obtuse,not apiculate apexes of anthers.