Graptophyllum pictum vs shrub

Graptophyllum pictum and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Graptophyllum pictum	Yes	No	No	No
shrub	Yes	No	No	No

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

Graptophyllum pictum: tropical Old World shrub having purple or red tubular flowers and leaf markings resembling the profile of a human face
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Graptophyllum pictum include bush.

Graptophyllum pictum (noun)	shrub (noun)
tropical Old World shrub having purple or red tubular flowers and leaf markings resembling the profile of a human face	a low woody perennial plant usually having several major stems