Salix uva-ursi vs willow tree

Salix uva-ursi and willow tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Salix uva-ursi	Yes	No	No	No
willow tree	Yes	No	No	No

As nouns, willow tree is a hypernym of Salix uva-ursi; that is, willow tree is a word with a broader meaning than Salix uva-ursi:

Salix uva-ursi: dwarf prostrate mat-forming shrub of Arctic and alpine regions of North America and Greenland having deep green elliptic leaves that taper toward the base
willow tree: any of numerous deciduous trees and shrubs of the genus Salix

Other hypernyms of Salix uva-ursi include willow.

Salix uva-ursi (noun)	willow tree (noun)
dwarf prostrate mat-forming shrub of Arctic and alpine regions of North America and Greenland having deep green elliptic leaves that taper toward the base	any of numerous deciduous trees and shrubs of the genus Salix