FAGACEAE 425 
eats lobes above the middle "d near the T queues beneath: acorn 
‘sessile or nearly so; cup turbinate, 9-12 mm. wide; l or ovoid, 12—15 
a long. Ro ocky soil, eae " thickets, on El. Avpalachian Valley, 
Ga. and Ala. 
nearly or wholly included E the cup.— n WAMP WHITE-OAK. 
WATER WHITE-OAK. WAMP POST-OAK.)—Swamps, usually along rivers, 
Coastal Plain and adj. provinces, Fla. to 1 Mo., (Ia.?) Ind., and N. J.— 
Hybridizes with Q. virginiana =x Q. Comptonae. 
6. Q. macrocarpa Michx. Tree becoming 55 m. tall the bark brown and 
often red-tinged, broken into irregular plates: le af-blades obovate to spatu- 
late in outline, 10-30 cm. long, finely tomentose beneath the pinnate lobes, 
ns long- 
stalked; cup deep-hemispherie or globula mm. wide, the upper scales 
with n tips; nut subglobose or Droadiy ellipsoid, a mm. long.— 
(OVERCUP-OAK. Mossy-cUP OAK.  BUR-OAK.)—Riech ods, Piedmont and 
uad ptus provinces, eee to Tex., Man., and N. ppt tea to hybridize 
h Q. Prinus=x Q.. Byars 
7. Q. bicolor Willd. Tree sometimes ae 36 m. tall, the bark gray- 
brown and often red-tinged, broken in broad ridges by more or less irregular 
lon 
fissures: leaf-blades obovate to elliptic-obovate, 5-20 cm. long, coarsely 
toothed, usually cuneate at the base, densely white-tomentose beneath: acorns 
lon talke ; cup saucer-shaped or depressed-hemis ; 
some of t raets aaa nut ellipsoid or ellipsoid-ovoid, 20-25 
mm. ved or slightly g latanoides (Lam.) Sudw.]— (SWAMP 
WHITE-OAK.)—Swamps, meadows, “an nd stream-banks, various provinces 
in Coastal Plain ers N, Ga. to Ark., Minn., and Me. 
8. Q. Prinus L. Tree becoming 35 m. tall, the bark silvery white or gray, 
and often red-tinged, ges into thin appressed scales: leaf-blades obovate, 
varying to elliptic, - s . long, coarsely doa -serrate, finely tomentose 
beneath: acorn sessile; cup nace eeply saucer-shaped or sh allow- -hemispherie, 25— 
35 mm. wide; nu A ellipsoid 2 ellipsoid-ovoid, 30— a5 mm. long. [Q. Michaux 
Nutt. (Cow: -OA BASKET-OAK. WAMP WHITE-OAK. eed CHESTNUT- 
OAK.) —Swamps, bottoms, em da hammocks, Coastal Plain and occa- 
s adj. province la. Tex, Mo. and N. J a ybridines with 
alba-xQ. Beadlei; as is a supposed hybrid with Q. macrocarpa = =x Q. 
Byarsi. 
9. Q. Muhlenbergii Engelm. Tree become 90 m. 2 the bark silvery 
white and often tinged with pida , broken into loose scales: leaf-blades 
lanceolate to pci ug i 5—20 em. long, "dos a e, with usually 
somewhat i ing teeth, inutely eria beneath or E acorns sessile, 
or ae cu pre enn E —17 mm. wide; nu oid, 15—20 
Q. ac mod P Mie chx.) Houba]—(C m NQUAPIN-O "o YELLO W-OAK.)—Cal- 
careous “bottoms and hillsides, various pie W Fla. to Tex., Minn., Ont., 
Vt. 
10. = BaT Willd. Tree becoming 30 m. tall, the bark reddish-brown 
or almost black, broken into broad rounded ridges and deep furrows: 
leaf- ladas PDC to oval, varying to broadest slightly above or below the 
