Pinus pungens vs true pine

Pinus pungens and true pine both are nouns.

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

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

Pinus pungens: a small two-needled upland pine of the eastern United States (Appalachians) having dark brown flaking bark and thorn-tipped cone scales
true pine: a coniferous tree

Other hypernyms of Pinus pungens include pine, pine tree.

Pinus pungens (noun)	true pine (noun)
a small two-needled upland pine of the eastern United States (Appalachians) having dark brown flaking bark and thorn-tipped cone scales	a coniferous tree