Prince of Wales heath vs Erica perspicua

Prince of Wales heath and Erica perspicua both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prince of Wales heath	Yes	No	No	No
Erica perspicua	Yes	No	No	No

As nouns, Prince of Wales heath and Erica perspicua are synonyms defined as:

Prince of Wales heath and Erica perspicua: South African shrub grown for its profusion of white flowers

Other synonyms of Prince of Wales heath include Prince-of-Wales'-heath.

Prince of Wales heath (noun)	Erica perspicua (noun)
South African shrub grown for its profusion of white flowers	South African shrub grown for its profusion of white flowers