Roccella tinctoria vs roccella

Roccella tinctoria and roccella both are nouns.

Word	Noun	Adjective	Verb	Adverb
Roccella tinctoria	Yes	No	No	No
roccella	Yes	No	No	No

As nouns, Roccella tinctoria and roccella are synonyms defined as:

Roccella tinctoria and roccella: a source of the dye archil and of litmus

Roccella tinctoria (noun)	roccella (noun)
a source of the dye archil and of litmus	a source of the dye archil and of litmus