Astroloma humifusum vs shrub

Astroloma humifusum and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Astroloma humifusum	Yes	No	No	No
shrub	Yes	No	No	No

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

Astroloma humifusum: small prostrate or ascending shrub having scarlet flowers and succulent fruit resembling cranberries; sometimes placed in genus Styphelia
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Astroloma humifusum include bush.

Astroloma humifusum (noun)	shrub (noun)
small prostrate or ascending shrub having scarlet flowers and succulent fruit resembling cranberries; sometimes placed in genus Styphelia	a low woody perennial plant usually having several major stems