Larix siberica vs Siberian larch

Larix siberica and Siberian larch both are nouns.

Word	Noun	Adjective	Verb	Adverb
Larix siberica	Yes	No	No	No
Siberian larch	Yes	No	No	No

As nouns, Larix siberica and Siberian larch are synonyms defined as:

Larix siberica and Siberian larch: medium-sized larch of northeastern Russia and Siberia having narrowly conic crown and soft narrow bright-green leaves; used in cultivation

Other synonyms of Larix siberica include Larix russica.

Larix siberica (noun)	Siberian larch (noun)
medium-sized larch of northeastern Russia and Siberia having narrowly conic crown and soft narrow bright-green leaves; used in cultivation	medium-sized larch of northeastern Russia and Siberia having narrowly conic crown and soft narrow bright-green leaves; used in cultivation