32 REPORT ON THE TIMBERS OF THE 
2. Genus Carya. 
Shagbark hickory, Carya alba (Nutt.) 
Black hickory, C. tomentosa (Nutt.) 
Pignut hickory, C. glabra (Sorr.) 
White hickory, C. microcarpa (Nutt.) 
ACERACEA—MAPLES. 
1. Genus Acer. 
Red maple, Acer rubrum (L.) 
White maple, A. dasycarpum (Ehrh.) 
Sugar maple, A. saccharinum (L.) 
Black sugar maple, A. nigrum (Mx.) 
CORNACEZ. 
1. Genus Cornus. 
Flowering dogwood, Cornus florida (L.) 
Low cornel, C. canadensis (L.) 
2. Genus Nyssa. 
Black gum, Nyssa multiflora (Wang.) 
Swamp black gum, N. uniflora (Walt.) 
BETULACEA—BIRCHWORTS. 
1. Genus Betula. 
Red birch, B. nigra (Ait.) 
2. Genus Alnus. 
Smooth alder, Alnus serrulata (Willd.) 
OLEACE&. | 
1. Genus Fraximus. 
White ash, Fraxinus Americana (L.) 
Black ash, F. sambucifolia (Lam. ) 
Blue ash, F. quadrangulata (Mx.) 
ULMACE—ELMWORTS. 
1. Genus Ulmus. 
Slippery elm (red elm), Ulmus fulva (L.) 
White elm, U. Americana (L.) 
Winged elm (whahoo), U. alata (Mx.) 
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