圆盔乌头，陕西毛茛科一新种

Aconitum rotundocassideum,a New Species of Ranunculaceae from Shaanxi

描述了自陕西省发现的毛茛科乌头属一新种,圆盔乌头(Aconitum rotundocassideum)。由于具有相似的体态和盔形上萼片,此种与特产云南省的粗茎乌头在亲缘上很相近,与后者的区别特征见正文。

A new species of the genus Aconitum （Ranunculaceae）, Aconitum rotundocas- sideum, is described here from Shaanxi Province. Having similar habit and galeiform upper sepals, this species is closely related to A. crassicaule W. T. Wang endemic to Gongshan County, Yunnan Province, though the latter differs by its flower arrangement in a panicle with three small 3-flowered racemes, usually arcuate pedicels, smaller rounded-galeiform or subglobose, conspicuously nerved, not beaked upper sepal and smaller lateral sepals, and 2-denticulate stamen filaments.