OF THE TRADEWATER REGION. 31 
2. Genus Fagus. 
Common beech, Fagus sylvatica (L.) 
Red beech, F. ferruginea (Ait.) 
3. Genus Ostrya. 
Hop hornbeam or ironwood, Ostrya virginica (Willd.) 
ORDER JUGLANDACEZ—WALNUT. 
1. Genus Juglans. 
White walnut, Juglans cinerea (L.) 
Black walnut, J. nigra (L.) 
2. Genus Carya. 
Shagbark hickory, Carya alba (Nutt.) 
Mockernut, C. tomentosa (Nutt.) 
Pignut hickory, C. glabra (Sorr.) 
White hickory, C. microcarpa (Nutt.) 
ORDER SILICACEZ—WILLOWWORTS. 
Genus Salix. 
Basket osier, Salix riminalis (L.) 
Green osier, S. petiolaris (Smith.) 
2. Genus Populus. 
Cotton tree, Populus angulata (Ait.) 
Silver-leaf poplar, P. alba (L.) 
Balm of gilead, P. candicans (Ait.) 
ORDER ACERACE&. 
I 
a. Genus Acer. 
Red maple, Acer rubrum. 
White maple, A. dasycarpum (Ehrh.) 
Sugar maple, A. saccharinum (L.) 
Black sugar maple, A. nigrum (Mx.) 
2. Genus Negundo. 
Box elder, Negundo aceroides (Moench.) 
ORDER ULMACE&—ELMWORTS. 
1. Genus Ulmus. 
Red elm (slippery elm), Ulmus fulva (L.) 
White elm, U)jamericana (L:) 
Winged elm (Whahoo), U. alata (Mx.) 
2. Genus Celtis. 
Hackberry, Celtis occidentalis (L.) 
