Plate IX, figures i & 2 : Plate XII, figures 4 & 5. 



QUERCUS DOUGLASII, Hooker & Arnott. 



Bibliography. 



QuERCUS DouGLASii, Hook. & Arn., Bot. Beechey's Voyage, 391 (1841). 



, Hook., Icones Plantarum, iv, 383 (1841). 



, Nuttall, N. Am. Sylv. i. 10, t, 4 (1842). 



, Benth., PI. Hartw, 337 (1849). 



QuERCUS Ransomi, Kellogg, Proc. Calif. Acad, i, 25 (1855). 

 QuERCUS DouGLASii, A. DC. Prodr, xxi", 23 (1864). 



, Torr., Bot. Wilke's Exp. 462 (1874). 



, Engelm., in Wats. Bot. Calif, ii, 95 (1880). 



, Kellogg, Forest Trees of Calif. 57 (1882). 



, Sargent, U. S. Forestry Rep. 142 (1884). 



, Behr, Fl. San Francisco, 269 (1888). 



QuERCUS OBLONGIFOLIA BREVILOBATA, Torr., Bot. Wilke's Exp. 460 (1874). 



Description. Tree from forty to sixty feet high, with short trunk and broad 

 rounded or depressed head; trunk from two to five feet thick, with light gray bark: branch- 

 lets short,- rigid, pubescent : leaves of firm texture, blue7green, only two or three inches in 

 length, oblong, sinuately lobed, or rarely almost entire, glabrate above, pubescent beneath: 

 acorn sessile or short-pedunculate; cup hemispherical, the scales ovate-lanceolate, flat or 

 rarely tubercled ; nut elongated-oblong, an inch and a quarter long, or often somewhat less, 

 tapering above. 



Habitat. On low foot hills of the middle parts of California, chiefly in the Coast 

 Range, but abundant eastward in Kern County, and northward along the lower flanks of 

 the Sierra Nevada. It is commonly associated with Q. Kelloggii and Q. Wislizeni^ and 

 has more the habit of an old orchard-tree than any of its associates, while the bluish cast 

 of the foliage renders the species easily distinguishable, at some distance, from even its 

 nearest ally, Q. Garryana. But it is also nearly related to the evergreen Q. Engelmanm^a. 

 species which replaces it in the hilly districts of the southern part of the State. 



Remarks. From the peculiar color of its foliage this tree has come to be known, in 



