Menziesia ferruginea vs shrub

Menziesia ferruginea and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Menziesia ferruginea	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of Menziesia ferruginea; that is, shrub is a word with a broader meaning than Menziesia ferruginea:

Menziesia ferruginea: straggling shrub of northwestern North America having foliage with a bluish tinge and umbels of small bell-shaped flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Menziesia ferruginea include bush.

Menziesia ferruginea (noun)	shrub (noun)
straggling shrub of northwestern North America having foliage with a bluish tinge and umbels of small bell-shaped flowers	a low woody perennial plant usually having several major stems