silkgrass vs Oryzopsis hymenoides

silkgrass and Oryzopsis hymenoides both are nouns.

Word	Noun	Adjective	Verb	Adverb
silkgrass	Yes	No	No	No
Oryzopsis hymenoides	Yes	No	No	No

As nouns, silkgrass and Oryzopsis hymenoides are synonyms defined as:

silkgrass and Oryzopsis hymenoides: valuable forage grass of dry upland areas and plains of western North America to northern Mexico

Other synonyms of silkgrass include Indian millet, mountain rice, silk grass.

silkgrass (noun)	Oryzopsis hymenoides (noun)
valuable forage grass of dry upland areas and plains of western North America to northern Mexico	valuable forage grass of dry upland areas and plains of western North America to northern Mexico