130 SYNOPSIS OF THE FLOE A OF COLORADO. 



light red bark, yellowish -brown within, cracking irregularly and cleav- 

 ing into small, very irregularly shaped scales ; known commonly as the 

 "Yellow Pine," and a most valuable timber-tree. Common through all 

 the lower slopes and less elevated districts of the mountains. Newberry, 

 1. c., p. 36, pi. 4. Hall & Harbour; Porter; Coulter. 



FINDS FLEXILIS, James. DC. Prod., I. c., p. 403. Tree of medium size ; 

 lower branches horizontal, upper ones ascending; bud-scales ovate, 

 acuminate, subfimbriate; sheaths 6" long, of several ovate and linear- 

 oblong, obtuse, deciduous scales ; leaves l'-3' (usually 2') long, J" wide, 

 in fives, densely crowded at the ends of the branchlets, rigid, smooth, 

 obtusely mucronate ; sterile aments numerous, 3"-5" long, in a thick, 

 subterminal spike ; cones resinous, 3-4, oval-oblong to ovate-cylindric, 

 2J'-5' long, l$'-2' broad, obtuse ; scales very broad, 8"-15", with a short 

 cuueate base, thick, pitted usually on both sides, the compressed sum- 

 mit terminating in the erect, acute, semicircular, transverse ridge, and 

 a subrhonibic, acutish umbo; seed 4"-5" long, 2J" wide, pale-colored 

 with a rudimentary wing. Bark thin, scaly, reddish or sometimes gray. 

 Rare. Divide west of South Park, Porter. Hall & Harbour, 529. 



PINUS ARISTATA, Engelm. DC. Prod., I. c., p. 400. Trans. Acad. Saint 

 Louis, vol. 2, t. 5 and 6. A tree of medium size, 40-50 high and l-2 

 in diameter; in alpine situations a stunted bush; leaves in fives, 

 crowded, erect, curving, 3-augled, smooth, obtusely inucrouate, deep 

 green, sides marked by a longitudinal, white-glaucous stripe l'-2' long; 

 sterile aments aggregated, oval, bracteate at base ; cones horizontal, 

 violet-brown, ovate or ovate-oblong, obtuse, resinous, 3 / -4 / long, 1J 7 

 broad ; the apophysis of the scales dark-violet, rhombic, not prominent; 

 transverse ridge acute; umbo small; awn lanceolate-subulate, rather 

 long, straight ; seeds obovate-oval, convex on both sides, nearly twice 

 shorter than the obtuse, broadish wing. A species known only from the 

 alpine regions of the Rocky Mountains of Colorado. Hall & Harbour; 

 Parry; Coulter. 



PINUS EDTJLIS, Engelm. DC. Prod., /. c., p., 398. A low, round-topped 

 tree, branched from the base or near it, 10-15 high, very strongly res- 

 inous; leaves mostly in pairs, rarely in threes, compressed-triqetrous, 

 semiterete and when dried appearing channeled, always short, rigid, 

 spreading, curved or straightish, smooth on the margin, niucronate, 

 pungent, green on the back, white-glaucous, I'-IJ 7 long (rarely 2'); bud- 

 scales ovate-lanceolate, acute, subentire on the margin, not fimbriate- 

 conuected, teeth very short, at length lacerate; sterile aments several, 

 small, oblong, obtusish, densely crowded in a short spike; antheriterous 

 bracts ovate-orbicular, nearly entire; cones sessile, subglobose, 2' long 

 and almost as broad ; apophysis of the scales raised-pyramidal, thick, 

 somewhat 3-angled, truncate at the apex, awnless ; seeds in each scale 

 2 or solitary, oblong, very convex, subaugled, brown, solid, wingless, 

 3"_4// i n length, edible. The " Pinon " of the Mexicans. A small, round- 

 topped tree, branched from the base or nearly so and resembling a small 

 apple-tree. The wood is full of resin and extremely slow to decay, thus 

 furnishing excellent fuel for camp-fires. The nutlets, which are about 

 the size of a pea, are agreeable to the taste, with a slight terebin- 

 th in ate flavor, and are much sought after by the Indians. It abounds in 

 Southern Colorado on the foot-hills and at lower elevations. Its north- 

 ern limit in Colorado appears to be about ten miles south of Twin Lakes, 

 at the base of the Snowy Range, and at Colorado Springs, east of the 

 mountains. Hall & Harbour, 532; Porter ; Coulter. 



ABIES ENGELMANNI, Parry. (Pinus commutata, Parl. DC. Prod., I. c. f 



