Leiophyllum buxifolium vs shrub

Leiophyllum buxifolium and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Leiophyllum buxifolium	Yes	No	No	No
shrub	Yes	No	No	No

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

Leiophyllum buxifolium: low-growing evergreen shrub of New Jersey to Florida grown for its many white star-shaped flowers and glossy foliage
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Leiophyllum buxifolium include bush.

Leiophyllum buxifolium (noun)	shrub (noun)
low-growing evergreen shrub of New Jersey to Florida grown for its many white star-shaped flowers and glossy foliage	a low woody perennial plant usually having several major stems