Viola canadensis vs violet

Viola canadensis and violet both are nouns.

Word	Noun	Adjective	Verb	Adverb
Viola canadensis	Yes	No	No	No
violet	Yes	Yes	No	No

As nouns, violet is a hypernym of Viola canadensis; that is, violet is a word with a broader meaning than Viola canadensis:

Viola canadensis: tall North American perennial with heart-shaped leaves and white flowers with purple streaks
violet: any of numerous low-growing violas with small flowers

Viola canadensis (noun)	violet (noun)
tall North American perennial with heart-shaped leaves and white flowers with purple streaks	a variable color that lies beyond blue in the spectrum
	any of numerous low-growing violas with small flowers

Viola canadensis (adjective)	violet (adjective)
	of a color intermediate between red and blue