(218) 



back ; acorn barrel-shaped or cylindric, 10-15 mm. long, 

 6-7 mm. in diameter, brown. 



This species is nearest related to J^. pungens but differs 

 in the flatter leaves, which are less deeply sinuate, less 

 spinulose and less pubescent. The fruit is also generally 

 longer and narrower. The fruit mounted on the type sheet 

 and figured by Torrey does not belong to this species but to 

 J?. Havard i (see that species). Q. undulata grows on 

 barren hills up to an altitude of 2000 meters ; the leaves 

 are evidently evergreen and more persistent than in J^. Fend- 

 leri, with which it grows and with which it has been con- 

 fused. 



Colorado : Rocky Mountains, Dr. James (type) ; Canon 

 of the Arkansas, 1874, George Engelmann. 



Texas: Fort Union, Upper Cimmaron, 1859, Nezvberry 

 (McComb's Exped.) ; Hurrah Creek and Llano Estacado 

 1853-4, Bigclozv (Whipple Exped.) ; Canon of Pecos River, 

 1883, V. Havard; El Paso, 1880, G. R. Vasey ; Buffalo 

 Gap Mountains, 1881, Havard; Mouth of Pecos River, Bige- 

 lozv (Mex. Bound. Surv.) ; Kerrville, 1899-1900, Havard & 

 Lacey. 



Mew Mexico: 1865, E. Palmer. 



Arizona: Swisshelm Mountains 1894, Tourney; 1869, 

 E. Palmer. 



Illustrations: PL 30. f. 4; Ton*. Ann. Lye. N. Y. 

 pi. 4 (except fruit) : Nutt. Silva, pi. 3 (poor) ; Greene, W. 

 Am. Oaks, pi. 30; Sargent, Silva N. Am. pi. 383. f. /, 4. (?). 



Quercus undulata Vaseyana (Buckl.). 



£>uercus Vaseyana Buckley, Bull. Torr. Club. 10: 91. 

 1883. 



More glabrate: leaves narrowly oblong, deeper undulate; 

 acorn usually shorter, 8-10 mm. long. 



Texas : Near Pecos River, Buckley ; Head of Devil's 

 River, Parry (Mex. Bound. Surv.) ; Meyers Spring and 

 Mountains near Presidio, 1880, Dr. Havard; Mouth of 

 Pecos, 1852 (Mex. Bound. Surv.). 



Illustration : PI. 30. f. 3. 



