Calamagrostis acutiflora vs feather reed grass

Calamagrostis acutiflora and feather reed grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
Calamagrostis acutiflora	Yes	No	No	No
feather reed grass	Yes	No	No	No

As nouns, Calamagrostis acutiflora and feather reed grass are synonyms defined as:

Calamagrostis acutiflora and feather reed grass: a variety of reed grass

Other synonyms of Calamagrostis acutiflora include feathertop.

Calamagrostis acutiflora (noun)	feather reed grass (noun)
a variety of reed grass	a variety of reed grass