Andropogon gerardii vs blue stem

Andropogon gerardii and blue stem both are nouns.

Word	Noun	Adjective	Verb	Adverb
Andropogon gerardii	Yes	No	No	No
blue stem	Yes	No	No	No

As nouns, Andropogon gerardii and blue stem are synonyms defined as:

Andropogon gerardii and blue stem: tall grass with smooth bluish leaf sheaths grown for hay in the United States

Other synonyms of Andropogon gerardii include Andropogon furcatus, bluestem.

Andropogon gerardii (noun)	blue stem (noun)
tall grass with smooth bluish leaf sheaths grown for hay in the United States	tall grass with smooth bluish leaf sheaths grown for hay in the United States