Plates X and XI. 



QUERCUS CERSTEDIANA, R. Br. Campst. 



Bibliography. 



QuERCUS CErstediana, R. Brown Campst, in Ann. & Mag. Nat. Hist., April, 1871, 



fide S. Watson, Proc. Am. Acad, xxii, 477. 

 Quercus lobata fruticosa, Englem., Trans. St. Louis Acad, iii, 389 (1876). 

 QuERCUS Breweri, Engelm., Bot. Cal. ii, 96 (1880). 



Description. Shrub from two to six feet high, the branchlets pubescent : leaves two 

 to five inches long, usually deeply pinnatifid, sometimes merely sinuate; lobes obtuse or 

 acutish, entire or toothed : acorns rarely subsessile, usually several, crowded near the sum- 

 mit of a peduncle an inch long or more ; cup shallow, strongly tuberculate ; nut oval, 

 obtuse, about an inch long. 



Habitat. Middle or higher altitudes of the Sierra Nevada, from Middle California 

 to Southern Oregon. 



Remarks. The two plates seem fully illustrative of the extremes of variability of 

 this imperfectly known, though not rare oak of our northeastern borders. 



Plate X represents a specimen which was brought from Modoc County, California, some 

 years ago, by the late Hon. J. B. Redding. There is nothing in Dr. Kellogg's manuscript 

 notes to indicate whence he had the materials of Plate XI ; the figures, however, plainly 

 represent the more reduced and stunted phases of the species. Dr. Englemann's purpose 

 of commemorating Professor Brewer's services to botany in the naming of this oak, appears 

 to have been thwarted beforehand. He was not aware that, as a species, the shrub had 

 already been named in honor of the eminent Danish botanist, CErsted. 



