Brewer's mountain heather vs purple heather

Brewer's mountain heather and purple heather both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brewer's mountain heather	Yes	No	No	No
purple heather	Yes	No	No	No

As nouns, Brewer's mountain heather and purple heather are synonyms defined as:

Brewer's mountain heather and purple heather: semi-prostrate evergreen herb of western United States

Other synonyms of Brewer's mountain heather include Phyllodoce breweri.

Brewer's mountain heather (noun)	purple heather (noun)
semi-prostrate evergreen herb of western United States	semi-prostrate evergreen herb of western United States