(22 3 ) 



duncled : cup shallow, 3-4 mm. deep, 10-14 mm - wide; 

 scales ovate, brown, pubescent, slightly thickened on the 

 back; acorn ellipsoid or barrel-shaped, mostly obtuse, 12-15 

 mm. long, brown, pubescent when young. 



In theUnited States this is only found in the Statesof Arizona 

 and New Mexico, and reaches an altitude of about 1000 m. ; 

 there it is only a small tree or shrub, but in Mexico it reaches 

 considerable size. It differs from its nearest relatives of the 

 region in the larger, thicker, strongly reticulate and strongly 

 pubescent leaves. Distinct as it seems to be there are cer- 

 tain forms that seem to connect it with J<\ Arizonica of the 

 same region. Professor Sargent's description and illustra- 

 tion of this species are excellent. 



Arizona: Chiricahua Mountains, 1894, Tourney; Mt. 

 Graham, 1874, Rothrock ; San Francisco Mountains, Capt. 

 E. K. Smith; Fort Huachuca, 1894, T. E. Wilcox; Dragon 

 Mountains, 1881, Vasey ; Santa Rita Mountains, 1881, C. 

 G. Pringle; San Francisco Mountains, Greene. 



Mexico: Patzuaro, 1892, C. G. Pringle, 41 16; Real del 

 Monte, 1848-9, Dr. J. Gregg, 638a; Sierre Madre, State of 

 Chihuahua, 1888, Pringle, 2021 ; 1840, Hartweg. 



Illustrations: PI. 31. f. 5 ; Humb. & Bonpl. PL Aquin. 

 ■pi. 86; Oersted, Liebm. Chenes Am. Trop. pi. H; pi. 34. f. 

 10-16; pi. 35' f. 13-22; Greene, W. Am. Oaks, pi. 16; 

 Sargent, Silva N. A. pi. 300. 



23. Quercus oblongifolia Torrey, Sitgreaves' Rep. 173. 



i853- 



J^tiercus undulata var. oblongata Engelm. Wheeler's Rep- 

 6: 250. 1878. 



j^iiercus undulata d grisea Wenzig, Jahrb. Bot. Gart. Ber- 

 lin, 3: 200, in part. 1885. 



A tree, seldom over 9 m.high. Bark of the trunk ashy gray, 

 checkered ; that of the branches gray or brownish, puberulent 

 only when young : bud-scales brown, at first tomentose : peti- 

 oles 2-3 mm. long : blades oblong, obtuse, 3-6 cm. long, ob- 

 tuse at the apex, obtuse or cordate at the base, in age perfectly 

 glabrous, pale bluish green on both sides, entire or on young 

 shoots dentate, rarely spinulose toothed: cup hemispheric. 



