| Noun | 1. | Menyanthaceae - a dicotyledonous family of marsh plants of order Gentianalesdicot family, magnoliopsid family - family of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination Gentianales, order Gentianales - an order of dicotyledonous plants having gamopetalous flowers; Gentianaceae; Apocynaceae; Asclepiadaceae; Loganiaceae; Oleaceae; Salvadoraceae genus Menyanthes, Menyanthes - the type genus of the Menyanthaceae; one species: bogbeans |