Oregon larch vs larch

Oregon larch and larch both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oregon larch	Yes	No	No	No
larch	Yes	No	No	No

As nouns, larch is a hypernym of Oregon larch; that is, larch is a word with a broader meaning than Oregon larch:

Oregon larch: tall larch of western North America have pale green sharply pointed leaves and oblong cones; an important timber tree
larch: any of numerous conifers of the genus Larix all having deciduous needlelike leaves

Other hypernyms of Oregon larch include larch tree.

Oregon larch (noun)	larch (noun)
tall larch of western North America have pale green sharply pointed leaves and oblong cones; an important timber tree	any of numerous conifers of the genus Larix all having deciduous needlelike leaves
	wood of a larch tree