Centaurium vs genus Centaurium

Centaurium and genus Centaurium both are nouns.

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

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

Centaurium and genus Centaurium: genus of low-growing herbs mostly of Northern Hemisphere having flowers with protruding spirally twisted anthers

Centaurium (noun)	genus Centaurium (noun)
genus of low-growing herbs mostly of Northern Hemisphere having flowers with protruding spirally twisted anthers	genus of low-growing herbs mostly of Northern Hemisphere having flowers with protruding spirally twisted anthers