EVERGREENS OF COLORADO 



Fig". 24. 



Enjvelmann 

 cones, x%. 



Spruce, a. Twig with 

 b. Seeds, natural size. 



mature 



KEY TO THE SPECIES OP Juniperus IN COLORADO. 



I. Leaves on mature branches in whorls of three, awl-shaped, spreading, 

 three-eighths to one-half inch long, deeply grooved or trough- 

 shaped and whitened on the upper surface, convex and green on the 

 lower surface; buds scaly. Low spreading shrub. 



1. Juniperus communis, var. sibirica. 



II. Leaves on mature branches opposite in pairs, scale-like and flattened 



against the branchlets, to which they are usully grown fast through 

 about half their length; about one-eighth inch long; on young trees 

 and vigorous shoots, slender pointed and somewhat spreading, one- 

 fourth to one-half inch in length; buds naked. Small or medium 

 sized trees (except No. 2). 



1. Low-spreading or prostrate shrub. 



2. Juniperus prostrata. 



2. Trees or tree-like, six to fifty feet high. 



A. Fruit large, one-fourth to one-third inch long; reddish 

 brown or copper-color with a bluish bloom; cotyledons of 

 the seed, 4-6. 



3. Juniperus Utahcnsis. 



B. Fruit small, usually less than one-fourth inch long; coty- 

 ledons of the seed, 2. 



a. Leaves slightly spreading at the tips, yellowish green; 

 fruit mostly one-seeded; seed thin-shelled. 



4. Juniperus monosperma. 



b. Leaves closely flattened against the branchlets, bluish 

 green; fruit, 1-4 seeded; seed thick shelled. 



5. Juniperus scopulorum. 



