332 BOTAiirr. 



stout and rigid, erect, curved, triangular, smooth, obtusely mucronate, the 

 inner faces striate ; sterile aments clustered, ovate, the anther-crest reduced to 

 1-2 small protuberances ; cones 3-5' long, 1-lj' wide, terminal and mostly 

 solitary, ovate-oblong, obtuse, "dark-brown;" scales 4-6" wide, with a 

 rhombic slightly elevated summit, the transverse ridge acute, the umbo small, 

 mucronate with a straight ascending awn ; seed 3" long, with a rather broad 

 obtuse elongated wing.— Northern Cahfornia, (Jeffrey.) Found only on the 

 summit of the East Humboldt Mountains, Nevada, at 9-10,000 feet altitude, 

 a few scattered trees of strict contracted habit, with thin light-gray bark, 

 smooth on the branches, which were covered by the short crowded leaves ; 

 cones 3-34' long, light-reddish-brown, with short awns. The Colorado 

 form, (P. aristata, Eng., which has been identified with this species by Dr. 

 Engelmann,) has smaller cones, 2-3' long, dark-colored, the lance-subulate 

 awn often 3" long. (1,112.) 



PiNUS FLEXiLis, James. DC. Prodr. 16. 2. 403. Middle-sized tree 

 with mostly horizontal branches ; bud-scales ovate, acuminate, subfimbriate ; 

 sheaths i' long, of several ovate and linear-oblong obtuse deciduous scales ; 

 leaves 1-3' (usually 2') long, j" wide, in fives, densely crowded at the ends 

 of the branchlets, rigid, smooth, obtusely mucronate; sterile aments numer- 

 ous, 3-5" long, in a thick subterminal spike, the anther-crest small and 

 irregularly incised-dentate, (or obsolete ;) cones 3-4, oval-oblong to ovate- 

 cylindric, 2i-5' long, 14-2' broad, obtuse ; scales very broad, (8-15",) with a 

 short-cuneate base, thick, pitted usually on both sides, the compressed summit 

 terminating in the erect acute semi-circular transverse ridge and a sub- 

 rhombic acutish umbo ; seed 4-5'' long, 24" wide, pale-colored, with a rudi- 

 mentary wing. — Bark rather thin, scaly, reddish or sometimes dark-gray. 

 Rocky Mountains, from New Mexico to Washington Territory. The preva- 

 lent pine in the East Humboldt Mountains, Nevada, and frequent in the 

 Wahsatch and Uintas; 6,500-11,000 feet altitude. The aged trees of the 

 East Humboldt Mountains, often 250-500 years old and 2-3° in diame- 

 ter, rarely 50° high, are too knotty and cross-grained to be valuable for 

 timber. (1,113.) 



Abies Engelmanni, Parry. (Pinus commutata, Pari. DC. Prodr. 16. 

 2. 417.) A tall pyramidal tree with horizontal branches ; branchlets pubes- 

 cent ; bud-scales ovate, obtuse, squarrose ; leaves crowded, 6-15" long, rigid, 

 compressed-tetragonal, abruptly and somewhat obtusely mucronate, very 



