多年生沉水型草本植物,莖為圓柱形,葉子比金魚藻寬些,3至6片輪生,為長披針狀線形,葉緣為細鋸齒緣,有一主脈,4至8月開花,雌雄異株,花成熟時,花柄伸出水面,花瓣為白色,橢圓形,呈皺褶狀,花蕊為黃色。
為溝渠、池沼及河流中的野生水草,有淨化水質的功能。可直接折莖枝栽植於水底泥土中,即能成長為新個體。常作為實驗、觀賞、養魚的材料。
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