风车草(Cyperus alternifolius),别名旱伞草,系莎草科莎草属的多年生草本植物。茎秆直立丛生,三棱形,无分枝;叶大而窄,聚生于茎顶,扩散成伞状,又似数架绿色旋转的小风车,十分奇特;花淡紫色,花期六至七月。风车草原产马达加斯加,一般分布于森林和草原地区的河湖边缘的沼泽地中,所以性喜温暖、阴湿及通风良好的环境。 Cyperus alternifolius, also known as Umbrella, is a perennial herb of the genus Cyperus. Culms erect, tufted, rhombic, unbranched; leaves large and narrow, polygamous to stem top, spreading into an umbrella-shaped, but also a few green-rotating small windmill, very strange; flowers lilac, flowering six to seven month. Madagascar is a windmill grassland native to the swamps at the edge of rivers and lakes in the forests and grasslands. It is a warm, humid and well-ventilated environment.