Water parsnip

1.

(Bot.) Any plant of the aquatic umbelliferous genus Sium, poisonous herbs with pinnate or dissected leaves and small white flowers.

Noun

1.

water parsnip - stout white-flowered perennial found wild in shallow fresh water; northern United States and Asia Synonyms: Sium suave

bog plant, genus Sium, marsh plant, Sium, Sium suave, swamp plant