genus Penstemon vs Penstemon fruticosus

genus Penstemon and Penstemon fruticosus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Penstemon	Yes	No	No	No
Penstemon fruticosus	Yes	No	No	No

genus Penstemon (noun)	Penstemon fruticosus (noun)
large genus of subshrubs or herbs having showy blue or purple or red or yellow or white flowers; mostly western North America	low bushy plant with large showy pale lavender or blue-violet flowers in narrow clusters at ends of stems