182 Eleventh Annual Report 



Distribution. Maryland to Missouri, south to Florida and west 

 to Texas. In Indiana it has been definitely noted only in Gibson 

 and Knox counties, where Robert Ridgway says it is common in 

 swamps along the Wabash and its tributaries. Several specimens 

 of this species were in the herbarium of Dr. Schneck which were 

 taken in lUinois just west of the above named counties. It is a 

 large tree resembling the burr oak and is not generally separated 

 from it. 



The published records are: Posey (Wright). 



Additional records are: Posey (Deam). 



Economic uses. Wood and uses similar to that of the white oak. 



4. Quercus macrocarpa Michaux. Burr Oak. Mossy Cup 

 Oak. Plate 47. Bark on the trunk gray to a brown, deeply 

 fissured; the branchlets on young trees developing corky wings 

 which are usually wanting on mature trees; twigs at first hairy 

 and yellowish, becoming at the end of the season smooth or nearly 

 so and a light gray or light brown; winter buds ovoid, round or 

 rather acute at the apex, 3-5 mm. (J/g-l/S inch) long, reddish- 

 brown, the scales nearly smooth with ciliate margins; leaves obo- 

 vate-oblong in outhne, 1-3 dm. (4-12 inches) long, narrowed at the 

 base, rounded or pointed at the apex, 5-9 lobed, sinuses shallow or 

 deep, lobes very variable, some leaves are barely lobed while others 

 are cut to the midrib, the terminal lobe usually the broadest, leaves 

 bronze-green when they appear, becoming firm at maturity, glabrous 

 and a dark green above, whitish beneath and covered with a woolly 

 pubescence; petioles 1-3 cm. (^-134 inches) long; acorns usually 

 solitary, sometimes in pairs or in clusters of 3, usually on short 

 stalks, sometimes on stalks 3 cm. (1J4 inches) long; nut very vari- 

 able in size and shape, ovoid to oblong, 2-3 cm. (J^-lM inches) 

 long, hairy at the apex, inclosed from 1/3 to almost its entire length 

 in the deep cup-shaped cup; cup rounded or gradually tapering at 

 the base, hairy within; scales woolly, at the base thin or thickened 

 and rounded at the apex, those at the top drawn to a long awn and 

 forming a fringe border around the cup. 



Distribution. Nova Scotia to Manitoba south to Georgia and 

 west to Texas and Wyoming. Frequent to common in moist rich 

 soil throughout Indiana. In a few of the hilly counties bordering 

 the Ohio River it does not occur so frequently. It is generally 

 found along or near the banks of streams. In point of number, 

 size, and value it ranks as one of the most valuable trees of the 

 State. 



