Comparison of forms of silver birch (Betula pendula Roth.) biometric indicators of the leaves in the northern subzone of the taiga

The article is devoted to the study of biological parameters of leaves of birch in the Northern subzone of the taiga. Revealed a statistically substantiated link between forms and such biometric parameters as leaf length, leaf width, petiole length, number of veins, distance from leaf base to widest part. The necessity of further in-depth study of the forms of silver birch.