叶互生，具叶柄；叶片卵形到线形，边缘全缘或近全缘。
Leaves alternate, petiolate; leaf blade ovate to linear, margin entire or nearly so.
恶性贫血，有巨卵形红细胞、多叶核嗜中性粒细胞。
This hypersegmented neutrophil is present along with macro-ovalocytes in a case of pernicious anemia.
叶片通常长圆形到卵形，心形的或近如此在基部；叶和果没有短柔毛。
Leaf blade usually oblong to ovate, cordate or nearly so at base; leaf and fruit without pubescence.
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.
叶倒卵形或倒卵状长椭圆形。
叶倒卵形或倒卵状长椭圆形。
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