Rhus laurina vs shrub

Rhus laurina and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rhus laurina	Yes	No	No	No
shrub	Yes	No	No	No

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

Rhus laurina: small aromatic evergreen shrub of California having paniculate leaves and whitish berries; in some classifications included in genus Rhus
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Rhus laurina include bush.

Rhus laurina (noun)	shrub (noun)
small aromatic evergreen shrub of California having paniculate leaves and whitish berries; in some classifications included in genus Rhus	a low woody perennial plant usually having several major stems