A freshwater plant(Pontederia cordata)of eastern North America,having heart - shaped leaves with long petioles and spikes of violet - blue flowers.

• 海寿，眼子菜北美洲东部的一种淡水植物(梭鱼草梭鱼草属)，有带有长柄的心形叶和紫蓝色穗状花序