Cercis vs genus Cercis

Cercis and genus Cercis both are nouns.

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

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

Cercis and genus Cercis: deciduous shrubs and trees of eastern Asia, southern Europe and the United States

Cercis (noun)	genus Cercis (noun)
deciduous shrubs and trees of eastern Asia, southern Europe and the United States	deciduous shrubs and trees of eastern Asia, southern Europe and the United States