Mahernia verticillata vs shrub

Mahernia verticillata and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mahernia verticillata	Yes	No	No	No
shrub	Yes	No	No	No

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

Mahernia verticillata: African shrub having decumbent stems and slender yellow honey-scented flowers either solitary or in pairs
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Mahernia verticillata include bush.

Mahernia verticillata (noun)	shrub (noun)
African shrub having decumbent stems and slender yellow honey-scented flowers either solitary or in pairs	a low woody perennial plant usually having several major stems