Birch
Betula lentaB. papyriferaB. pendula (syn. B. verrucosa), and B. pubescens (syn. B. alba)
Family: Betulaceae

by Josef Brinckmann, Thomas Brendler

INTRODUCTION

The Betulaceae family includes an estimated 150 to 200 species of trees and shrubs,1 and, depending on the author, the Betula genus includes about 30 to 60 of those species. Betula species are deciduous trees or shrubs and are monoecious (they have both male and female catkins, spike-like inflorescences of unisexual flowers). Authorities differ on the precise number of Betula species. This is likely because birches hybridize easily, which confounds species delineation.2 […]

Source: https://crookedbearcreekorganicherbs.com/2020/04/08/modern-research-of-birch/

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