Prunus lyonii vs cherry tree

Prunus lyonii and cherry tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prunus lyonii	Yes	No	No	No
cherry tree	Yes	No	No	No

As nouns, cherry tree is a hypernym of Prunus lyonii; that is, cherry tree is a word with a broader meaning than Prunus lyonii:

Prunus lyonii: evergreen shrub or small tree found on Catalina Island (California)
cherry tree: any of numerous trees and shrubs producing a small fleshy round fruit with a single hard stone; many also produce a valuable hardwood

Other hypernyms of Prunus lyonii include cherry.

Prunus lyonii (noun)	cherry tree (noun)
evergreen shrub or small tree found on Catalina Island (California)	any of numerous trees and shrubs producing a small fleshy round fruit with a single hard stone; many also produce a valuable hardwood