\^y 1mi:li> AIaxual 



l'>. Leal-lobes trianiiular-ovate, short; sliruljs or low trees. 

 O. ilicifolia. 



l(i. Leaves rounded or obtuse at the base, '■]-■) lohed ; lobes 

 linear or lanceolate, often falcate. • O. triloba. 



\u. Leaves cuneare to truncate at the base, 5-11 lobed ; lobes 

 triangular. Q. pagodaefoUa. 



17. Leaves usually pubescent below; winter l)uds tomentose-, 

 cup turbinate or hemispherical : inner bark orange. 

 O. vclutina. 



17. Leaves glabrous with the excciitinn of tufts of hairs in 

 the axils of the veins 1)el<^\v ; winter l)uds glabrous or 

 niinutely pul)escent. L*^. 



IN. Cu]) of the acorn top-sliaped or hemispheric. 1!'. 



]H. Cup of the acorn shallow, saucer-shaped, uiuch l)roader 

 ' than deep. 20. 



10. -Leaves dull, paler beneath; acorri ovoid, cup depressed- 

 hemispheric. O. horcalis. 



!!•. Leaves shining on both sides, li.bed to hear the mid-rib; 

 acorn ovoid ; cup top-shaped. O. corciiira. 



2i». Leaves dull; cup '-1 in. liroad; acorn ovoid or elon- 

 gated. O. rubra. 



'2'K Leax'es shining dee])ly iiimiatifid; cu|) '-2 in. JM'oad ; 

 acorn sul)globose or ovoid. O. palitsfris. 



Clicstiiut oaks. 



1. Quercus prinus L. Rock Chestnut Oak. A large 

 tree witli l)rown l)ark. ridged close or slightly flaky. Leaves ob- 

 long, oblong-lanceolate, or oboxate, coarsely crcnate, glabrous 

 above, linely gray-tomentulose beneath, petioles slender; cup 

 hemispheric, ]-l\ in. l)road, peduncles equalling or shorter 

 than the petioles ; acorn ovoid. 2-'^ times as high as the cup, 

 seed edible but not very sweet. Self-prunes. Wood hard 

 and strong ; used in fencing and for railroad ties. Bark rich 

 in tannin. In dry soil. Ale. to Out., Ala., and Tenn. 



2. Quercus michaiixii Nutt. Cow Oak.. A large tree 

 with liak\- white 1)ark. Leaves obovate or broadly oblong, 

 crenately toothed, the teeth often mucronulate, 4-8 in. long, 

 cup depressed-hemispheric, short-peduncled, 1-11 in. i)road; 

 acorns ovoid, about 3 times as high as the cup, sweet and 

 edible. Wood valuable like the White Oak. In moist soil. 

 Del. to Ind.. Mo.. Ark., Fla., and Tex. 



