70 



PlNACEAE 



Juniperus 



50 



Map 66 



Thuja occidentalis L. 



50 



Map 67 

 Juniperus communis 



var. depressa Pursh 



45. JUNIPERUS [Tourn.] L. Juniper 



Leaves mostly in whorls of o, glaucous beneath, all linear and sharp-pointed, mostly 

 7-15 mm long; stem divided at the surface of the ground, the several subdivisions 

 or branches decumbent and growing to great lengths, rarely one branch becoming 

 a leader 1. J. communis var. depressa. 



Leaves not in whorls, scalelike on fertile branchlets and linear on sterile branchlets, 

 generally green on both sides, the scalelike ones 1-2 mm long and the linear ones 

 mostly less than 10 mm long; stems erect with lateral branches like those of other 

 trees 2. «/. virginiana var. crehra. 



1. Juniperus communis L. var. depressa Pursh. (Juniperus sibirica of 

 Britton and Brown, Illus. Flora, ed. 2.) Prostrate Juniper. Map 67. 

 This species has an erratic distribution and grows in widely different 

 habitats. It is frequent in the dunes near Lake Michigan where a single 

 plant will form a large clump. I found specimens in Steuben County in a 

 decadent tamarack bog, one of which had a spread of about 25 feet. The 

 branches were in a whorl and the plant was circular in shape with the 

 tips of the decumbent branches usually 4-7 feet high. In Elkhart County 

 I found a specimen in hard, clay soil 3 miles northwest of Goshen. This 

 specimen maintained an erect branch with a very strong taper. It had just 

 been cut and the upright branch was made into a small fence post. At the 

 base where the tree was cut off it was a foot in diameter and it had many 

 radiating branches that were several inches in diameter. I saw this variety 

 growing in both Jefferson and Wayne Counties in shallow soil on rocky 

 slopes. In 1923 I transplanted a seedling about 6 inches high from the 

 dunes into a black loam soil and it grew erect until it reached a height of 

 about 3 feet when the leader began to become decumbent and three 

 branches at the surface began to elongate. After 12 years all the branches, 

 numbering about 50, are decumbent and radiate in all directions, forming 

 a circular clump 15 feet across, the branches being 4-6 feet high. This 

 variety also occurs in Montgomery County. 



Lab. to B. C, southw. to Conn., N. Y., and in the Rocky Mts. to Colo, 

 and Utah. 



