Calopogon pulchellum vs Calopogon tuberosum

Calopogon pulchellum and Calopogon tuberosum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Calopogon pulchellum	Yes	No	No	No
Calopogon tuberosum	Yes	No	No	No

As nouns, Calopogon pulchellum and Calopogon tuberosum are synonyms defined as:

Other synonyms of Calopogon pulchellum include grass pink.

Calopogon pulchellum (noun)	Calopogon tuberosum (noun)
an orchid	an orchid