Ulmus parvifolia vs elm tree

Ulmus parvifolia and elm tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ulmus parvifolia	Yes	No	No	No
elm tree	Yes	No	No	No

As nouns, elm tree is a hypernym of Ulmus parvifolia; that is, elm tree is a word with a broader meaning than Ulmus parvifolia:

Ulmus parvifolia: small fast-growing tree native to Asia; widely grown as shelterbelts and hedges
elm tree: any of various trees of the genus Ulmus: important timber or shade trees

Other hypernyms of Ulmus parvifolia include elm.

Ulmus parvifolia (noun)	elm tree (noun)
small fast-growing tree native to Asia; widely grown as shelterbelts and hedges	any of various trees of the genus Ulmus: important timber or shade trees