Siberian larch vs Larix siberica

Siberian larch and Larix siberica both are nouns.

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

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

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

Other synonyms of Siberian larch include Larix russica.

Siberian larch (noun)	Larix siberica (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