322 PINUS EDULIS. 



trial. The descriptions of P. edulis, P. monophylla and P. Parryana 

 which may properly follow here are all abridged from Professor Sargent's 

 monumental work "The Silva of North America," as no specimens are 

 known to exist in this country of sufficient age to afford satisfactory 

 materials for the purpose. 



Pinus edulis. 



A low tree, not more than 12 15 feet high with a short divided 

 trunk and round-topped broad head, rarely 30 40 feet high. 

 Branchlets stoutish, orange-brown ; buds ovate, acute, less than half-an- 

 inch long with light chestnut-brown scales. Leaves geminate, rarely 

 terriate, persistent three four years, semi-terete or triquetral, rigid, 

 incurved, entire with a callous tip 0'75 1*5 inch long. Staminate 

 flowers about 0'25 inch long, in short, dense spikes, with dark red 

 anthers and surrounded by four involucral bracts. Cones 1 1-5 inch 

 in diameter, the larger fertile scales broadly cuneate, rounded arid much 

 thickened at the apex, with a transverse keel on the back, and a 

 small, four-angled, central knob, terminating in a concave umbo with 

 a minute incurved tip. Seeds about 0*5 inch long with a pale 

 reddish brown narrow wing. 



Pinus edulis, Engelmann (1848), ex Sargent, Silva N. Anier. XL 55, t. 552. 

 Parlatore, D. C. Prodr. XVI. 398. Hooker fil in Gard. Chron. XXVI (1886), 

 p. 300, with fig. Beissner, Nadelholzk. 252. Masters in Journ. R. Hort. Soc. 

 XIV. 228. 



Pinus edulis is distributed over the Rocky Mountain States from 

 southern Wyoming to New Mexico and western Texas, spreading west- 

 wards to the eastern borders of Utah and over the mountains of 

 northern and central Arizona at 6,000 7,000 feet elevation. The 

 wood is of little value except for fuel. 



Pinus monophylla. 



A low tree, usually 15 20 but occasionally 40 50 feet high with 

 a short trunk rarely more than a foot in diameter and often divided 

 near the ground into several stout, spreading stems. Branchlets stout, 

 at first light orange-brown, changing to dark brown at the end of 

 three or four years. Buds ovate, obtuse, about 0*25 inch long with 

 chestnut-brown scales. Leaves persistent four five years, solitary and 

 terete, occasionally geminate and semi-terete, rigid, incurved with long- 

 callous tips, 1*25 2 -25 inches long, pale glaucous green, with a loose 

 basal sheath nearly 0'5 inch long. Staminate flowers oval, about 

 0-25 inch long, dark red surrounded by six involucral bracts. Cones 

 1*5 2 '5 inches in diameter, the fertile scales broadly oblong, rounded 

 at the apex, much thickened and four-angled, terminating in a truncate 

 or slightly concave umbo with a minute, incurved tip. Seeds full 

 and rounded at the base, acute at the apex, more than 0'5 inch long, 

 and furnished with a narrow wing. 



Pinus monophylla, Torrey (1845), ex Sargent, Silva N. Anier. XL 51, t. 551. 

 Lawson, Pinet. Brit. I. 65, t. 9 and figs. Engelmann in' Brewer and Watson's Bot. 

 Califor. II. 124. Masters in Gard. Chron. XX. (1883), p. 48, with fig. Beissner, 

 Nadelholzk. 254 



P. Fremontiana, Endlicher, Synops. Conif. 183 (1847). 



