G. 88) CLASSIFICATION AND DESCRIPTION 1538 
1. Quércus 4lba, L. (AMERICAN WHITE 
Oak.) Leaves short-stemmed, acute at 
base, with 3 to 9 oblong, obtuse, usually 
entire, oblique lobes, very persistent, 
many remaining on the tree through the 
winter; pubescent when young, soon 
smooth, bright green above. Acorns in 
the axils of the leaves of the year, ovoid- 
oblong, 1 in., in a shallow, rough cup, 
often sweet and edible. A large tree, 1 gy 
60 to 80 ft. high, with stem often 6 ft. a 
in diameter; wood light-colored, hard, 
tough and very useful. Common throughout. 
2. Quércus stellata, Wang. 
(Post-oaK. RovuaH or Box 
WHITE Oak.) Leaves 4 to 6 
{VY in. long, sinuately cut into 5 
) to 7 roundish, divergent lobes, 
the upper ones much larger and 
often 1- to 3-notched, grayish- 
or yellowish-downy beneath, 
and pale and rough above. 
Acorn ovoid, about 44 in. long, 
one third to one half inclosed in a deep, saucer-shaped cup ; in the 
axils of the leaves of the year. A medium-sized tree, 40 to 50 ft. 
high, with very hard, durable wood, resembling that of the White 
Oak. Massachusetts, south and west. 
Q. stellata. 
3. Quércus macrocarpa, Michx. 
(Bur-oak. Mossy-cup.) Leaves 
obovate or oblong, lyrately pin- 
natifid or deeply sinuate-lobed or 
nearly parted, the lobes sparingly 
and obtusely toothed or entire. 
Acorn broadly ovoid, 1 in. or more 
long, one half to almost entirely 
inclosed in a thick and woody cup 
with usually a mossy fringed bor- 
der formed of the upper awned 
scales; cup very variable in size, 34 
to 2 in. across. A handsome, mid- 
dle-sized tree, 40 to 60 ft. high. 
Western New England to Wisconsin, and southwestward. 
te 
4 
Q. macrocarpa, 
