elymus(n = noun.plant) genus elymus - tall tufted perennial grasses (such as lyme grass or wild rye);
is a kind of liliopsid genus, monocot genus
is a member of family graminaceae, family gramineae, family poaceae, graminaceae, gramineae, grass family, poaceae

elymus arenarius, elymus canadensis, elymus caput-medusae, elymus condensatus, elymus hispidus, elymus trachycaulos, genus elymus