101 
leaves obovate in outline, 6-12 em. (214-484 inches) long, wedge- 
shaped at base, coarsely toothed and irregularly lobed, sinuses wide 
or narrow, lobes and teeth ascending except the lowest pair, lobes 
and teeth generally triangular, sometimes oblong, dark green above, 
paler and densely gray pubescent beneath; petioles 1.5-3 em. (14- 
1144 inches) long; acorns on stalks about 0.5 em. (1/5 inch) long; 
nut ovoid, about 2 em. (24 inch) long, rounded or flat at the base, 
rounded at the apex, chestnut brown, pubescent near the summit, 
enclosed for 1/3 or more of its length in the thin saucer-shaped 
cup; cup rounded at the base, pubescent within; scales blunt, 
thickened on the back, brown, densely gray pubescent. 
Distribution. This hybrid oak was discovered by E. B. William- 
son in an open woods about 2 miles northwest of Bluffton, October 
9, 1904. An effort was made to save the tree, but it was cut a 
few years afterward. The determination was made by George B. 
Sudworth and a specimen is deposited in the National herbarium. 
The tree was located on a slope, associated with Quercus alba and 
Muhlenbergu. 
2. Quercus stellata Wangenheim Post Oak. IRonOaxk. Sanp 
Burr Oak (Gibson County). Plate 45. Bark a light or medium 
gray, resembling that of the white oak, fissured, deeply so on old 
trees, tight not scaly on the trunks; branchlets stout, brownish- 
woolly at first, becoming smooth, gray to dark brown after the 
first year; winter buds broadly ovate, blunt or acute, hairy; leaves 
on stalks about 12 mm. (1% inch) long, obovate in outline, usually 
1-1.5 dm. (4-6 inches) long, about 1 dm. (4 inches) across at the 
widest point, wedge-shaped at the base, usually 5-lobed, the two 
lower lobes small with rounded or pointed ends, the two upper and 
terminal lobes larger and frequently with 2-3 secondary lobes, the 
ends of the lobes usually rounded, sometimes with rather sharp 
points, sinuses oblique, usually wide and with rounded bases, leaves 
thick and firm, dark green, shiny and with a few scattered hairs 
above, densely covered with grayish hairs beneath; fruit sessile or 
short stalked, often in pairs or clusters; nut ovate or ovate-oblong, 
about 1.5 em. (°4 inch) long, hairy at the apex, enclosed by the 
cup for about half its length; cup hemispheric, somewhat elon- 
gated at the base; scales rusty pubescent, acute at the top and obtuse 
at the base of the cup. 
Distribution. In uplands from Massachusetts and New York to 
Florida and west to Missouri and Texas. In Indiana it is rare and 
local. It has been reported from Lake County in the northern 
part of the State where its appearance must be regarded as excep- 
