squaw grass vs genus Xerophyllum

squaw grass and genus Xerophyllum both are nouns.

Word	Noun	Adjective	Verb	Adverb
squaw grass	Yes	No	No	No
genus Xerophyllum	Yes	No	No	No

squaw grass (noun)	genus Xerophyllum (noun)
plant of western North America having woody rhizomes and tufts of stiff grasslike basal leaves and spikes of creamy white flowers	small genus of North American herbs having grasslike basal leaves: squaw grass; sometimes placed in family Melanthiaceae