logwood vs genus Haematoxylum

logwood and genus Haematoxylum both are nouns.

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

logwood (noun)	genus Haematoxylum (noun)
spiny shrub or small tree of Central America and West Indies having bipinnate leaves and racemes of small bright yellow flowers and yielding a hard brown or brownish-red heartwood used in preparing a black dye	small genus of tropical American spiny bushy shrubs or trees
very hard brown to brownish-red heartwood of a logwood tree; used in preparing a purplish red dye