red shrubby penstemon vs redwood penstemon

red shrubby penstemon and redwood penstemon both are nouns.

Word	Noun	Adjective	Verb	Adverb
red shrubby penstemon	Yes	No	No	No
redwood penstemon	Yes	No	No	No

As nouns, red shrubby penstemon and redwood penstemon are synonyms defined as:

red shrubby penstemon and redwood penstemon: low branching dark green shrub with bunches of brick-red flowers at ends of branches; coastal ranges and foothills of northern California

red shrubby penstemon (noun)	redwood penstemon (noun)
low branching dark green shrub with bunches of brick-red flowers at ends of branches; coastal ranges and foothills of northern California	low branching dark green shrub with bunches of brick-red flowers at ends of branches; coastal ranges and foothills of northern California