Description of Native Trees 
18. Live Oak. (Quercus virens.) 
LEAF: 1-3, simple, alternate, entire or spiny-toothed, oblong 
to elliptical, hairy beneath, evergreen, leathery; acorn oblong. 
Virginia. (Pl. I.) 
19. Upland Willow-oak. (Quercus cinerea.) 
LEAF: much as in 18, but more lance-shaped, and more downy 
beneath ; acorn globular. East Virginia. 
20. Linden. Basswood. Lime-tree. (Tilia Americana.) 
LeaF: 5'-6’, simple, alternate, sharply serrate, roundish, green 
and smooth on both sides, base oblique and often slightly cordate. 
FLOWER: whitish, fragrant, small, clustered and attached to a 
long, narrow, leaf-like appendage; June. (PI. IV.) 
21. Downy-leaved Basswood. (Tilia pubescens.) 
LEAF: 2'-3', like 20, but smaller, and soft hairy beneath. 
Maryland, south and west. . 
22. White Basswood. (Tilia heterophylla.) 
LEAF: 6-7, like 20, but larger, and whitish beneath. Moun- 
tains of Pennsylvania, south and west. 
23. European Linden. (Tilia Europza.) 
LEAF: as in 20, but smaller, and generally cordate. FLOWER: 
lacks the petal-like scales among the stamens found in American 
species. Cultivated. 
24. Common Aspen. (Populus tremuloides.) 
LEAF: 1%4'-2', simple, alternate, finely serrate or crenate, 
roundish or ovate, apex pointed, base cordate, stem thin. Bark 
yellowish or greenish-white. (Pl. V.) 
25. Large-toothed Aspen. (Populus grandidenta.) 
LEAF: 3-4’, simple, alternate, very coarsely serrate with blunt 
teeth, broad-ovate, young leaves very white-woolly, soon becoming 
smooth ; leaf and tree larger than 24, but bark similar. (Pl. V.) 
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