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Flowers bisexual ; basal leaves neither hastate nor sagittate .

花两性；基生叶既不戟形也不箭头形。

Corolla glabrous ; leaf blade hastate , hastate-oblong , or narrowly ovate-deltate .

花冠无毛；叶片戟形，戟形的长圆形，或狭卵形三角形。

Flowers unisexual and plants dioecious ; basal leaves hastate or sagittate .

花单性并且雌雄异株；基生叶戟形的或箭头形。

Genus of aquatic herbs of temperate and tropical regions having sagittate or hastate leaves and white scapose flowers .

生长于温带或热带地区的一个水生草本植物属，叶箭头状或戟形，花具花葶，白色花。

Twining herbs ; leaves sagittate , cordate , or hastate basally , petiolate or subsessile .

特文宁草本；箭头形，心形的叶，基部的或戟形，叶具柄或近无柄。