genus Salix vs Salix amygdaloides

genus Salix and Salix amygdaloides both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Salix	Yes	No	No	No
Salix amygdaloides	Yes	No	No	No

genus Salix (noun)	Salix amygdaloides (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