Quercus 12,23 



apex, tapering at the base and prolonged as a narrow wing on each side of the 

 petiole ; under surface glabrous. Branchlets glabrous. 



53. Quercus acuta, Thunberg. Japan. See p. 1330. 



Leaves similar to those of Q. glabra, but with a long acuminate apex. 

 Young branchlets covered at first with a brown tomentum, which quickly 

 disappears, some, however, remaining near the tip of the branchlets or above 

 the insertion of the leaves. 



54. Quercus cuspidata, Thunberg. China, Japan, Formosa. See p. 1332. 



Leaves elliptical, 2 to 3 in. long, with a long acuminate apex ; lower surface 

 glabrous. Branchlets slender, scaly. 



55. Quercus crassipes, Humboldt and Bonpland. Mexico. See p. 1254. 



Leaves oblong, 2 to 3 in. long, with a bristle point at the apex, brown 

 tomentose beneath. Branchlets pubescent. 

 55A; Quercus Ilex. See No. 56. 



B. Leaves distinctly toothed in margin, and plainly pubescent on the lower surface. 



* Leaves white or grey beneath. 

 (a) Leaves not lanceolate. 



56. Quercus Ilex, \Av\x\.'SM^. Mediterranean region. Seep. 1281. 



Leaves very variable, ovate or oval, i to 3 in. long ; margin entire or 

 spinose- dentate ; lower surface covered with a dense greyish or whitish 

 tomentum ; lateral nerves, seven to ten pairs ; stipules long, linear, persistent 

 around the terminal bud. 



57. Quercus Suber, Linnaeus. Mediterranean region. See p. 1292. 



Leaves ovate or oblong, about 2 in. long, usually concave ; margin with 

 small mucronate teeth ; lower surface covered with a dense greyish tomentum ; 

 lateral nerves, five to seven pairs ; stipules short, linear-obovate, occasionally 

 persistent, but inconspicuous around the terminal bud. 



58. Quercus alnifo Ha, Vo&ch. Cyprus. Seep. 1278. 



Leaves orbicular or obovate, i|- to 2 in. long, usually concave ; margin with 

 minute mucronate teeth; lower surface covered with a dense yellowish grey 

 tomentum ; lateral nerves, five to eight pairs, very prominent. 



(b) Leaves lanceolate 



59. Quercus incana, Royihmgh. Himalayas. See p. 1298. 



Leaves elliptic-lanceolate, acuminate at the apex, 3 to 6 in. long ; nerves, ten 

 to fifteen pairs, each ending in a mucronate triangular serration ; lower surface 

 densely white tomentose. 



60. Quercus glauca, Thunh&rg. Himalayas, China, Japan. See p. 1328. 



Leaves ovate-lanceolate, acuminate, about 3 in. long; nerves, about ten 

 pairs; mucronate-serrate in the upper half; lower surface white, with scattered 



appressed silky hairs. 



** Leaves green beneath. 



61. Quercus glabrescens, Bentham. Mexico. See p. 1300. 



Leaves obovate-oblong, 2 to 2^ in. long, with a few gland-tipped teeth in 



