black larch vs Larix laricina

black larch and Larix laricina both are nouns.

Word	Noun	Adjective	Verb	Adverb
black larch	Yes	No	No	No
Larix laricina	Yes	No	No	No

As nouns, black larch and Larix laricina are synonyms defined as:

black larch and Larix laricina: medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark

Other synonyms of black larch include American larch, tamarack.

black larch (noun)	Larix laricina (noun)
medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark	medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark