Haematoxylum vs genus Haematoxylum

Haematoxylum and genus Haematoxylum both are nouns.

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

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

Haematoxylum and genus Haematoxylum: small genus of tropical American spiny bushy shrubs or trees

Other synonyms of Haematoxylum include genus Haematoxylon, Haematoxylon.

Haematoxylum (noun)	genus Haematoxylum (noun)
small genus of tropical American spiny bushy shrubs or trees	small genus of tropical American spiny bushy shrubs or trees