Pinus densiflora vs true pine

Pinus densiflora and true pine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pinus densiflora	Yes	No	No	No
true pine	Yes	No	No	No

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

Pinus densiflora: pine native to Japan and Korea having a wide-spreading irregular crown when mature; grown as an ornamental
true pine: a coniferous tree

Other hypernyms of Pinus densiflora include pine, pine tree.

Pinus densiflora (noun)	true pine (noun)
pine native to Japan and Korea having a wide-spreading irregular crown when mature; grown as an ornamental	a coniferous tree