genus Salix vs red osier

genus Salix and red osier both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Salix	Yes	No	No	No
red osier	Yes	No	No	No

genus Salix (noun)	red osier (noun)
a large and widespread genus varying in size from small shrubs to large trees: willows	Eurasian osier having reddish or purple twigs and bark rich in tannin
	common North American shrub with reddish purple twigs and white flowers