Viscum vs genus Viscum

Viscum and genus Viscum both are nouns.

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

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

Viscum and genus Viscum: type genus of the Viscaceae: Old World evergreen shrubs parasitic on many trees including oaks but especially apple trees, poplars, aspens and cottonwoods

Viscum (noun)	genus Viscum (noun)
type genus of the Viscaceae: Old World evergreen shrubs parasitic on many trees including oaks but especially apple trees, poplars, aspens and cottonwoods	type genus of the Viscaceae: Old World evergreen shrubs parasitic on many trees including oaks but especially apple trees, poplars, aspens and cottonwoods