Pinus radiata vs true pine

Pinus radiata and true pine both are nouns.

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

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

Pinus radiata: tall California pine with long needles in bunches of 3, a dense crown, and dark brown deeply fissured bark
true pine: a coniferous tree

Other hypernyms of Pinus radiata include pine, pine tree.

Pinus radiata (noun)	true pine (noun)
tall California pine with long needles in bunches of 3, a dense crown, and dark brown deeply fissured bark	a coniferous tree