Larix russica vs Larix siberica

Larix russica and Larix siberica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Larix russica	Yes	No	No	No
Larix siberica	Yes	No	No	No

As nouns, Larix russica and Larix siberica are synonyms defined as:

Larix russica 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 Larix russica include Siberian larch.

Larix russica (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