white mangrove vs genus Avicennia

white mangrove and genus Avicennia both are nouns.

Word	Noun	Adjective	Verb	Adverb
white mangrove	Yes	No	No	No
genus Avicennia	Yes	No	No	No

white mangrove (noun)	genus Avicennia (noun)
a small to medium-sized tree growing in brackish water especially along the shores of the southwestern Pacific	small genus of tropical shrubs or trees
shrub to moderately large tree that grows in brackish water along the seacoasts of western Africa and tropical America; locally important as a source of tannin