Frocccdiiii^s of the Ohio State Academy of Science 141 



lobes narrowly triangular, spreading or somewhat ascending, 

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

 closed in the cuj). Jn wet or moist soil. Xa. and N. Car. to Ga., 

 Ind., and Alo. 



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

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

 in. lung, short-petioled, grayish-white tomentulose beneath t^-j- 

 lobed. lobes triangular-ovate, acute; cup saucer-shaped, ^-| in. 

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

 longer than the cup. In sandy or rock}- soil. Me. to Pa., Del., 

 and in mountains (jf X. C. and Kv. 



11. Quercus marylandica Muench. lilack-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 ai)ex, 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. Hybridizes with Q. 

 pheUos and 0. nana. L. I. to Ohio, Neb., Fla., and Tex. 



12. Quercus nigra L. Black A\'ater Oak. A tree of 

 ra])id 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 i in. wide ; acorn globose-ovoid, 2-3 times as high as the cup. 

 \\'()ii(l heavy, hard, and strong; used for fuel, l^suallv along 

 streams and swam])S. Del. to Ky., Mo., Fla., and Tex. 



13. Quercus phellos L. A\'illow 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. LLbridizes with 0. nana and probably 



0. rubra, producing the form known as O Jieterophylla Mx. L. 



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



14. Quercus imbricaria Mx. .Shingle Oak. A large 

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

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

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



