聚合果长10 - 12厘米，穗状；蓇葖长圆形、倒卵形或卵形，顶端圆钝或具短凸尖。
Fruit an aggregate, spicate, 10-12 cm long; follicles long ellipsoid, obovoid or ovoid, apex obtuse or abruptly mucronate.
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.
倒卵形至倒卵状椭圆形，稀为倒卵状长圆形，长6至12厘米，阔2.5至5厘米。
Obovate to obovate-elliptic, very rarely obovate-oblong, 6-12 cm x 2.5-5 cm.
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