Wyoming Experiment Station. 



Pinus Murrayana, Balfour, Jeffr. Rep. Oreg. Exp. (1853). 



Noted in the foothills in the Laramie and Medicine Bow ranges, 

 where it is of frequent occurrence along streams. 



Our specimens from Pole Creek, May 12, 1894 (No. 12); May 

 18, 1895 (No. 1213). Lods^e Pole Pine. 



Pinus ponderosa scopulorum, Engelm. Wats. Bot. Cal. ii, 126 (1880). 



This forms a somewhat scattering growth on the higher more ex- 

 posed ridges in the Laramie range, and less conspicuously so in the 

 other ranges visited. 



Laramie Hills. May 12, 1894 (No. 17). Rocky Mountain Yellow 

 Pine. 

 Picea Engelmanni, Engelm. 



This forms a considerable proportion of the forest growth in the 

 Medicine Bow and probably in the other ranges of our state. At- 

 taining its most luxuriant growth at about 9,000 ft., it is the sole 

 survivor of the trees at timber line and there becomes reduced and 

 spreading-prostrate. Said to be the most valuable of our trees for 

 lumber. 



Union Pass, August 13, 1894 (No. 1014); La Plata Mines, Au- 

 gust 24, 1895 (No. 1841). Engehnann s Spruce. 

 Picea pungens, Engelm. 



This is much less common and usually occurs along streams in 

 the wooded foothills. Tt is considered the most beautiful of our 

 Spruces and is well worthy of the high esteem in which it is held as 

 an ornamental tree. 



Laramie Hills, May 12, 1894 (No. 16); Cummins, July 30, 1895 

 (No. 1549). Blue Spruce. Balsam. 

 Pseudotsuga Douglasii, Carr. 



The largest of our forest trees, attaining a remarkable size in the 

 lower altitudes of our mountain ranges. 



Laramie Hills, May 12, 1894 (No. 14); April 1895 (No. 1208); 

 Douglas Spruce. 

 Juniperus communis, L Sp. PI. 1040 (1753). 



Very rare; Cummins, July 28. 1895 (No. 1481). 



Juniperus communis alpina, Gaud. Fl. Helv. vi, 301 (1830). /. natta, 

 Willd. 



This is abundant on hillsides at all altitudes. 



Laramie Hills, May 4, 1894 (No. 11); Little Sandy, August 30, 



