Structural peculiarities of the stem of Betula megrelica Sosn. and B. litwinowii Doluch

The present work describes microstructural characteristics of the stems of B. litwinowii and B. megrelica. This investigation provides referential anatomical information for correct identification and differentiation of these species. Structural peculiarities of the stem of the species such as color of the central cylinder, existence of calcium oxalate crystals, radial rays of the conductive systems and other anatomical characteristics give the possibilities to make difference among of two species of the Genus Betula L.