Common Name: 

Some 35 species of mostly deciduous trees or shrubs, gray, smooth or scaly bark, slender shoots, lacking a terminal bud.  Leaves alternate, simple, in 2 rows, usually serrate, with 7-14 vein pairs.  Female catkins terminal, erect at first, later pendulous, 5-20+ pairs.  Fruit a small ribbed nutlet subtended by a persistent three-lobed or deeply toothed bract.  Native ranges include Europe to East Asia and North and Central America.
Carpinus: classical Latin name.

Betulaceae (Birch Family)