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BETULACEAE Gray

Family composed of 6 genera and about 235 species of deciduous trees and shrubs, distributed in temperate and cold regions of the Northern Hemisphere and the Andes. In North Africa 2 genera are represented.

Key to genera

1 Leaves triangular. Infructescence longly cylindrical, not lignified, dehiscent Betula

1 Leaves suborbicular. Infructescence ellipsoid, woody, not dehiscent Alnus

Updated by: G. Benítez, J. Molero Mesa & J. Charco.