Proceedings of the Ohio State Academy of Science 141 



lobes narrowly triangular, spreading or somewhat ascending, 

 usually entire ; cup sessile, shallow, acorn globose, about -J en- 

 closed in the cup. In wet or moist soil. Va. and N. Car. to Ga., 

 Ind., and Mo. 



10. Quercus nana (Marsh.) S;arg. Bear Oak. A shrub 

 or small tree, often forming thickets. Leaves mostly obovate, 2-5 

 in. long, short-petioled, grayish-white tomentulose beneath 3-7- 

 lobed, lobes triangular-ovate, acute ; cup saucer-shaped, 5-I in. 

 broad, with a turbinate or rounded base ; acorn globose-ovoid, 

 longer than the cup. In sandy or rocky soil. Me. to Pa., Del., 

 and in mountains of N. C. and Ky. 



11. Quercus marylandica Muench. Black-jack (Oak). 

 Usually a small shrubby tree ; bark nearly black with very rough 

 ridges. Leaves obovate, 3-5 lobed toward the broad usually nearly 

 truncate apex, cuneate below, the lobes short, stellate-pubescent 

 above, brown-tomentose beneath when young, mature leaves gla- 

 brous above ; cup deep about ^ in. broad ; acorn ovoid, 2-3 times 

 as high as the cup. In dry sterile soil. Llybridizes with Q. 

 phellos and Q. nana. L. I. to Ohio, Neb., Fla., and Tex. 



12. Quercus nigra L. Black Water Oak. A tree of 

 rapid growth with gray bark, rough in ridges. Leaves spatulate 

 or obovate, 1-3-lobed at the apex or some of them entire and 

 rounded, short-petioled ; cup saucer-shaped, rounded at the base, 

 about ^ in. wide ; acorn globose-ovoid, 2-3 times as high as the cup. 

 ^^'ood heavy, hard, and strong ; used for fuel. LIsually along 

 streams and swamps. Del. to Ky., Mo., Fla., and Tex. 



13. Quercus phellos L. WilloM- Oak. A tree with 

 slightly roughened, reddish brown bark. Leaves narrowly-ob- 

 long or oblong-lanceolate, entire, very short petioled ; cup saucer- 

 shaped, nearly flat on the base ; acorn subglobose, bitter. Wood 

 poor. In moist woods. Hybridizes with Q. nana and probably 



0. nibra, producing the form known as Q heterophylla Mx. L. 



1. to Fla., Mo., and Tex. 



14. Quercus imbricaria Mx. Shingle Oak. A large 

 stout tree, the leaves dying off but remaining on the tree until 

 about April i. Leaves oblong or lanceolate, entire, persistently 

 gray-tomentulose beneath, 3-7 in. long; cup hemispheric or turbi- 



