Pinus taeda vs true pine

Pinus taeda and true pine both are nouns.

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

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

Pinus taeda: tall spreading three-needled pine of southeastern United States having reddish-brown fissured bark and a full bushy upper head
true pine: a coniferous tree

Other hypernyms of Pinus taeda include pine, pine tree.

Pinus taeda (noun)	true pine (noun)
tall spreading three-needled pine of southeastern United States having reddish-brown fissured bark and a full bushy upper head	a coniferous tree