ribbon grass vs Phalaris arundinacea

ribbon grass and Phalaris arundinacea both are nouns.

Word	Noun	Adjective	Verb	Adverb
ribbon grass	Yes	No	No	No
Phalaris arundinacea	Yes	No	No	No

As nouns, ribbon grass and Phalaris arundinacea are synonyms defined as:

ribbon grass and Phalaris arundinacea: perennial grass of marshy meadows and ditches having broad leaves; Europe and North America

Other synonyms of ribbon grass include gardener's garters, lady's laces, reed canary grass.

ribbon grass (noun)	Phalaris arundinacea (noun)
perennial grass of marshy meadows and ditches having broad leaves; Europe and North America	perennial grass of marshy meadows and ditches having broad leaves; Europe and North America