Pinus cembra vs pine tree

Pinus cembra and pine tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pinus cembra	Yes	No	No	No
pine tree	Yes	No	No	No

As nouns, pine tree is a hypernym of Pinus cembra; that is, pine tree is a word with a broader meaning than Pinus cembra:

Pinus cembra: large five-needled European pine; yields cembra nuts and a resinous exudate
pine tree: a coniferous tree

Other hypernyms of Pinus cembra include pine, true pine.

Pinus cembra (noun)	pine tree (noun)
large five-needled European pine; yields cembra nuts and a resinous exudate	a coniferous tree