Subclass:

Hamamelidae

 

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 Links to Family Pages:

 Betulaceae  Fagaceae  Platanaceae
 Cannabaceae  Hamamelidaceae  Ulmaceae
 Casuarinaceae  Juglandaceae  Urticaceae
 Cecropiaceae  Moraceae  
 Cercidiphyllaceae  Myricaceae  

 Subclass consisting of 26 families, and about 3,400 species of angiosperms - often referred to as the Amentiferae, or wind-pollinated group. The Hamamelidae are defined by a suite of characters correlated with wind pollination (anemophily): generally woody and deciduous; more or less strongly reduced, unisexual flowers that are borne in catkins; smooth pollen; and nut-like fruits with one or few seeds.

All recent evidence (fossil and morphological/molecular phylogenetic studies) indicate that the Hamamelidae are completely unnatural - with this syndrome of characters evolving independently several times. Most Hamamelidae now belong to various lineages of the Rosidae or to a basal grade of "eudicots" called the "lower hamamelids."

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