noun
: a low aquatic or marsh plant ( Helianthium parvulum ) of the family Alismataceae common in No. America and having long-stalked lanceolate leaves and white flowers
noun
: a low aquatic or marsh plant ( Helianthium parvulum ) of the family Alismataceae common in No. America and having long-stalked lanceolate leaves and white flowers
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012