Family BETULACEAE (Birch Family)
Inception: end of the Cretaceous period, 70 million years ago
Origin: central China
130 species
includes six genera
birches, alders, hazels, hornbeams
Genus ALNUS
Genus ALNUS
ALDERS
Alnus - Alder
Betula - Birch
Genus BETULA
Birch
Carpinus - Hornbeam
Ostrya - Hop-hornbeam
Ostryopsis - Hazel-hornbeam
Genus Corylus - Hazel
Genus Corylus
Hazels