Vitis vs genus Vitis

Vitis and genus Vitis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vitis	Yes	No	No	No
genus Vitis	Yes	No	No	No

As nouns, Vitis and genus Vitis are synonyms defined as:

Vitis and genus Vitis: the type genus of the family Vitaceae; woody vines with simple leaves and small flowers; includes a wide variety of grapes

Vitis (noun)	genus Vitis (noun)
the type genus of the family Vitaceae; woody vines with simple leaves and small flowers; includes a wide variety of grapes	the type genus of the family Vitaceae; woody vines with simple leaves and small flowers; includes a wide variety of grapes