Viola tricolor vs pink of my John

Viola tricolor and pink of my John both are nouns.

Word	Noun	Adjective	Verb	Adverb
Viola tricolor	Yes	No	No	No
pink of my John	Yes	No	No	No

As nouns, Viola tricolor and pink of my John are synonyms defined as:

Viola tricolor and pink of my John: a common and long cultivated European herb from which most common garden pansies are derived

Other synonyms of Viola tricolor include heartsease, Johnny-jump-up, love-in-idleness, wild pansy.

Viola tricolor (noun)	pink of my John (noun)
a common and long cultivated European herb from which most common garden pansies are derived	a common and long cultivated European herb from which most common garden pansies are derived