Lepechinia calycina vs shrub

Lepechinia calycina and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lepechinia calycina	Yes	No	No	No
shrub	Yes	No	No	No

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

Lepechinia calycina: California plant with woolly stems and leaves and large white flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Lepechinia calycina include bush.

Lepechinia calycina (noun)	shrub (noun)
California plant with woolly stems and leaves and large white flowers	a low woody perennial plant usually having several major stems