Of the Family 'Betulaceae' or Birch Family
Betulaceae, the birch family, includes six genera of deciduous nut-bearing trees and shrubs, including the birches, alders, hazels, hornbeams, hazel-hornbeam, and hop-hornbeams numbering a total of 167 species. They are mostly natives of the temperate Northern Hemisphere, with a few species reaching the Southern Hemisphere in the Andes in South America. Their typical flowers are catkins and often appear before leaves. In the past, the family was often divided into two families, Betulaceae (Alnus, Betula) and Corylaceae (the rest). Recent treatments, including the Angiosperm Phylogeny Group, have described these two groups as subfamilies within an expanded Betulaceae: Betuloideae and Coryloideae.
Birch species are generally small to medium-sized trees or shrubs, mostly of northern temperate and boreal climates. Betula species are organised into five subgenera.
Birch species are generally small to medium-sized trees or shrubs, mostly of northern temperate and boreal climates. Betula species are organised into five subgenera.
The 'Betula' Genus includes;
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Note: many American texts have B. pendula and B. pubescens confused, though they are distinct species with different chromosome numbers. Birches native to North America include:
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© 2014 Bohemefit for Fuerza International.
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