wire grass vs genus Eleusine

wire grass and genus Eleusine both are nouns.

Word	Noun	Adjective	Verb	Adverb
wire grass	Yes	No	No	No
genus Eleusine	Yes	No	No	No

wire grass (noun)	genus Eleusine (noun)
coarse annual grass having fingerlike spikes of flowers; native to Old World tropics; a naturalized weed elsewhere	annual and perennial grasses of savannas and upland grasslands
handsome hardy North American grass with foliage turning pale bronze in autumn