ENGELMANN PINUS ARISTATA, ETC. 205 



On Pinus aristata, a New Species of Pine, discovered by 

 Dr. (J. C. Parry in the Alpine Regions of Colorado Ter- 

 ritory, and on some other Pines of the Pocky Mountains. 

 By (i. Kngelmann, M.D. 



During his first botanical expedition to the Pike's Peak re- 

 gion, Dr. Parry, in searching for James' Pin us fe.rilis, found, 

 instead of one, two five-leaved pines, which evidently had 

 been confounded by Dr. James ; thus the discrepancies of his 

 description are fully explained. His general description of 

 the tree and the edible seeds belong to what we now 

 name P. flexilis, while the "erect cones" (smaller than those 

 of P. rigida) "with unarmed scales" must be either very im- 

 perfect young ones of this, or old ones of the new species, 

 which had lost their awns. 



Pinus aristata, spec. nov. : arbor mediocris seu humilis; 

 foliis dense congestis quinis uncialibus integris acutiusculis 

 ex axillis perularum per plures annos persistentium, squamis 

 vao-inantibus obtusis mox patulis squarrosis demum totis de- 

 ciduis; amentia masculis ovatis involucro 4-phyllo munitis in 

 axilla bracteae ovaUe acuminata; persistentis stipitatis, anthe- 

 rarum crista ad umbonem parvulum singulum vel binos 

 reducta ; amentis femineis erect is herbaceo-echinatis atro 

 purpureis; strobilis ovatis horizontalibus violaceo-fuscis, squa- 

 marum elongato-cuneatarum apophysi rhombea parum tume- 

 scente transverse carinata medio in umbone parvo breviter 

 aristata; seminibus ala ipsa oblique obovata duplo minoribus. 



On alpine heights, between 9,200 and 11,81)0 or 12,000 feet 

 high, on Pike's Peak and the high mountains of the Snowy 

 Range, Dr. Parry, 1861 and 18G2; Messrs. JPdl & Harbour, 

 (Coll. No. 530) 1802. Also on the heights of the Coochetopa 

 Pass, nearly S.W. of Pike's Peak, (altitude over 10,000 feet,) 

 where Capt. Gunnison discovered in 1853 what seems to be 

 this species without fruit; (see Pac. li.ll. Rep. II., p. 130 ;) 

 the leaves which I could compare are those of our plant Fl. 

 end of June and beginning of July. Flourishing best in the 

 higher elevations and never descending below 9,000 feet, in 

 its lower ranges not ripening its fruits as well as on the bleak 

 heights, this truly alpine species — in that respect our repre- 

 sentative of the European P. Pumilio — characterizes the 

 highest belt of timber on the peaks of Colorado. On sheltered 

 slopes a tree 40 or 50 feet high and 1-2 feet in diameter, it 

 becomes a straggling bush, prostrate, and almost creeping, 

 on the bleak summits of the high ridges. The bark is thin 

 and scaly, even in older trees not more than 3 or 4 lines thick, 

 of a light grayish-brown color; that of younger branches 

 smooth, with many large vesicles containing a clear fluid 

 balsam, which remains between the layers of the old bark. 



