genus Salix vs almond-leaves willow

genus Salix and almond-leaves willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Salix	Yes	No	No	No
almond-leaves willow	Yes	No	No	No

genus Salix (noun)	almond-leaves willow (noun)
a large and widespread genus varying in size from small shrubs to large trees: willows	willow of the western United States with leaves like those of peach or almond trees