Petteria ramentacea vs shrub

Petteria ramentacea and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Petteria ramentacea	Yes	No	No	No
shrub	Yes	No	No	No

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

Petteria ramentacea: erect shrub having large trifoliate leaves and dense clusters of yellow flowers followed by poisonous seeds; Yugoslavia; sometimes placed in genus Cytisus
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Petteria ramentacea include bush.

Petteria ramentacea (noun)	shrub (noun)
erect shrub having large trifoliate leaves and dense clusters of yellow flowers followed by poisonous seeds; Yugoslavia; sometimes placed in genus Cytisus	a low woody perennial plant usually having several major stems