154 TREES OF THE NORTHERN UNITED STATES 
4, Quércus lyrata, Walt. (Swamp Post- 
oak.) Leaves crowded at the ends of the 
branchlets, very variable, obovate-oblong, 
more or less‘deeply 7- to 9-lobed. white-to- 
mentose beneath when young, becoming 
smoothish; the lobes triangular to oblong, 
acute or obtuse, entire or sparingly toothed. 
Acorn about 34 in. long, nearly covered by 
Q. lyrata. the round, ovate, thin, rugged, scaly cup. 
A large tree with pale flaky bark. River-swamps in southern In- 
diana to Wisconsin, and southward. 
5. Quércus bicolor, Willd. (Swamp 
WHITE Oak.) Leaves obovate or oblong- 
obovate, wedge-shaped at base, coarsely 
sinuate-crenate, and often rather pin- 
natifid than toothed, whitish, soft-downy 
beneath. Main primary veins6 to 8 pairs. 
Acorns, nearly 1 in., oblong-ovoid, set in 
a shallow cup often mossy fringed at the 
margin, on a peduncle about as long as 
the acorn, much longer than the petioles 
of the leaves; in the axils of the leaves 
of the year. A large tree, 60 to 80 ft. 
1 
cane © 
SA 
Q. bicolor. 
high, stem 5 to 8 ft. in diameter. Most 
+|— 
Q. Michatxii. 
7. Quércus Prinus, L. 
common in the Northern and Western 
States, in swamps, but found.in moist 
soil in the mountains of the South. 
6. Quércus Michanxii, Nutt. (Bas- 
KET-OAK or Cow-0akK.) Leaves 5 to 6 
in. long, oval to obovate, acute, obtuse, 
or even cordate at base, regularly but 
usually not deeply sinuate, rather rigid, 
usually very tomentose beneath. Acorn 
large, 144 in. long, sweet and edible; 
cup shallow and roughened with coarse, 
acute seales; no fringe. A large and 
valuable Oak with gray and flaky bark. 
(CHESTNUT-oAK.) Leaves obovate or 
oblong, coarsely undulately toothed, with 10 to 16 pairs of straight, 
prominent ribs beneath; 
surface minutely downy beneath, and 
smooth above. Acorn ovoid, 1 in. long, covered nearly half-way 
