Erica perspicua vs erica

Erica perspicua and erica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Erica perspicua	Yes	No	No	No
erica	Yes	No	No	No

As nouns, erica is a hypernym of Erica perspicua; that is, erica is a word with a broader meaning than Erica perspicua:

Erica perspicua: South African shrub grown for its profusion of white flowers
erica: any plant of the genus Erica

Other hypernyms of Erica perspicua include true heath.

Erica perspicua (noun)	erica (noun)
South African shrub grown for its profusion of white flowers	any plant of the genus Erica