a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth

semiaquatic Eurasian perennial crowfoot with leaves shaped like spears; naturalized in New Zealand

semiaquatic European crowfoot with leaves shaped like spears

swamp plant of Europe and North America having bright yellow flowers resembling buttercups

grasslike plants growing in wet places and having cylindrical often hollow stems

perennial marsh plant having swordlike leaves and aromatic roots