Penstemon barbatus vs golden-beard penstemon

Penstemon barbatus and golden-beard penstemon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Penstemon barbatus	Yes	No	No	No
golden-beard penstemon	Yes	No	No	No

As nouns, Penstemon barbatus and golden-beard penstemon are synonyms defined as:

Penstemon barbatus and golden-beard penstemon: plant of southwestern United States having long open clusters of scarlet flowers with yellow hairs on lower lip

Penstemon barbatus (noun)	golden-beard penstemon (noun)
plant of southwestern United States having long open clusters of scarlet flowers with yellow hairs on lower lip	plant of southwestern United States having long open clusters of scarlet flowers with yellow hairs on lower lip