Jersey pine vs pine tree

Jersey pine and pine tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jersey pine	Yes	No	No	No
pine tree	Yes	No	No	No

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

Jersey pine: common small shrubby pine of the eastern United States having straggling often twisted or branches and short needles in bunches of 2
pine tree: a coniferous tree

Other hypernyms of Jersey pine include pine, true pine.

Jersey pine (noun)	pine tree (noun)
common small shrubby pine of the eastern United States having straggling often twisted or branches and short needles in bunches of 2	a coniferous tree