water dragon

(noun) North American herbaceous perennial of wet places having slender curled racemes of small white flowers. Synonyms: lizard's-tail, swamp lily, water dragon, Saururus cernuus.

(noun) swamp plant of Europe and North America having bright yellow flowers resembling buttercups. Synonyms: marsh marigold, kingcup, meadow bright, May blob, cowslip, water dragon, Caltha palustris.