Catharanthus vs Vinca rosea

Catharanthus and Vinca rosea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Catharanthus	Yes	No	No	No
Vinca rosea	Yes	No	No	No

Catharanthus (noun)	Vinca rosea (noun)
small genus of erect annual or perennial herbs native to Madagascar; widely naturalized in the tropics; formerly included in genus Vinca	commonly cultivated Old World woody herb having large pinkish to red flowers