一种美国水生植物，叶肾形或圆心形，佛焰苞具有短的柄或无柄；通常扎根在池塘和水沟的底部淤泥中。

American plant with roundish heart-shaped or kidney-shaped leaves; usually rooted in muddy bottoms of ponds and ditches.

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通体呈四瓣瓜棱形，肩部一侧置短流，另一侧置曲柄，与流、柄成十字形的颈、肩之间置双系。

Quintana was four melon prism, set the side of the shoulder short flow, the other side of the crank set, and flow into the handle cross-shaped neck, between the shoulder rear dual system.

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