genus Vitis vs Vitis

genus Vitis and Vitis both are nouns.

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

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

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

genus Vitis (noun)	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