Bouteloua eriopoda vs grama

Bouteloua eriopoda and grama both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bouteloua eriopoda	Yes	No	No	No
grama	Yes	No	No	No

As nouns, grama is a hypernym of Bouteloua eriopoda; that is, grama is a word with a broader meaning than Bouteloua eriopoda:

Bouteloua eriopoda: a pasture grass (especially of western coastal regions of North America)
grama: pasture grass of plains of South America and western North America

Other hypernyms of Bouteloua eriopoda include grama grass, gramma, gramma grass.

Bouteloua eriopoda (noun)	grama (noun)
a pasture grass (especially of western coastal regions of North America)	pasture grass of plains of South America and western North America