中国菊科植物一新归化属——黄菊属

Flaveria Juss.(Compositae), a ewly naturalized genus in China

报道了在河北和天津发现的菊科一新记录属和一新记录种,即黄菊属Flaveria Juss.及二齿黄菊F.bidentis (L.) Kuntze,并提供墨线图。黄菊属与万寿菊属TagetesL.和天人菊属Gaillardia Fouger.近缘,它们的共同特征是花序托无托片;不同点在于黄菊属叶对生或交互对生,常基部连合,头状花序在枝顶聚集成平顶形的伞房状或近球形的复合花序,花黄色,舌状花1(-2),冠毛缺。

Flaveria bidentis (L.) Kuntze, a newly naturalized genus and species of Compositae form Hebei and Tianjin, China, is described and illustrated. Flaveria Juss. is related to Tagetes L. and Gaillardia Fouger. in having phoranthium without chaffy bracts, but differs by having leaves opposite and decussate, base usually connate, capitula aggregated in flat-topped corymbose panicles or glomerulelike synflorescences in the apex of the branches, flower yellow, ligule floret 1 (rarely 2), pappus absent.