178 Eleventh Annual Report 



leaves obovate in outline, 6-12 cm. (23^-4j^ 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 cm. (3/2- 

 134 inches) long; acorns on stalks about 0.5 cm. (1/5 inch) long; 

 nut ovoid, about 2 cm. (J^ 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 alha and 

 Muhlenhergii. 



2. Quercus stellata Wangenheim Post Oak. Iron Oak. Sand 

 Burr Oak (Gibson County). Plate 45. Bark a hght 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. (3^ 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 obhque, 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 cm. (5^ 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 exeep- 



