92 



SILVA OF NORTH AMERICA. 



CUPULIFER-E. 



purple astringent cotyledons ; the ciip^ which incloses about a quarter of the nut^ is shallow^ cup-shaped 

 dark brown and pubescent within^ and coated with pale or fulvous tomentum on the outer surface 

 which is covered by small ovate acute scales with thin free scarious tips, and, at the bottom of the cup 

 slightly thickened and rounded on the back. 



The 



ood of Quercus retlcidata. which 



y 



heavy, hard, and 



o 



d contains 



numerous small scattered open ducts and many broad medullary rays 



dark brown with thick lighte 



ed sapwood. The specific gravity of the absolutely dry wood is 0.9479, a cubic foot weighing 



59-07 poimd 



In the United States Q 



discovered 



Mt. Graham, A 



of nine thousand five hundred feet above the sea by Dr. J. T. Rothrock ^ in 1874 



, at an elevation 

 It has also been 



found 



the summits of 



Santa Rita, Huachuca, Chiricahua, and Santa Catahna Mountains 



Arizona and on the San Luis and Animas Mountains in southern New Mexico 



1 Joseph Trimble Rothrock was born In McVeytown, Mifflin fornia. He largely prepared the volume in which are described 



County, Pennsylvania, on April 9, 1839, and received his early edii- the plants collected by him at this time, and is the author of a 



cation in Pennsylvania in the Freeland Seminary and in Academia, report on the flora of Alaska, published in the Report of the 



Juniata County ; he then entered the Lawrence Scientific School of Secretary of the Smithsonian Institution for 1867. In 1877 Dr. 



Harvard University, from which he was graduated in 1864, and three Rothrock was appointed professor of botany in the University of 



years later received a degree in medicine from the University of Pennsylvania, and in November, 1892, general secretary of the 



Pennsylvania. He was botanist to a party sent to the Northwest in Pennsylvania Forestry Association. 



1865 to explore a route for a. proposed telegraph line across Behr- ^ Quercus reticulata was found on the mountains of southern 



ing's Sea, and from 1873 to 1875 was surgeon and botanist to the New Mexico in the summer of 1892 by Dr. Edgar A. Mearns, 



United States Geographical Survey of the country west of the one 



Boundary 



hundredth meridian, which, under command of Lieutenant George growing on their summits as a little shrub and at lower eleva- 



Wheele 



tions as a small tree with rough whitish bark. 



EXPLANATION OF THE PLATE. 



Plate CCCXC. Quercus reticulata, 



1. A flowering branch, natural size. 



2. A staminate flower, enlarged. 



3. A pistillate flower, enlarged. 



4. A fruiting branch, natural size. 



5. A fruiting branch, natural size. 



