叶15～20，卵形到倒卵形或倒披针形，有锐尖或钝圆，6×2.7厘米，3毫米厚，深橄榄绿色微染紫色，有横向和纵向的暗纹。
Leaves 15 - 20, ovate to obovate or oblanceolate, acute or obtuse, 6 x 2.7 cm, to 3 mm thick, dark olive green tinged purple, with transverse and longitudinal markings.
北美东部产的一种普通水生植物，飘浮叶长圆形至倒卵形，基部常具缺刻，花白色，有黄斑点。
Common aquatic plant of eastern North America having floating and submerged leaves and white yellow-spotted flowers.
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