36 BULLETIN 207, IT. S. DEPARTMENT OF AGRICULTURE. 



KEY TO SPECIES OF JUNIPERUS. 



Trunk bark divided into squarish plates Juniperus pachyphloea. 



Trunk bark longitudinally furrowed and ridged : 



Leaves minute, scalelike, closely pressed upon twigs: 



Branchlets drooping 1 Juniperus flaccida. 



Branchlets not drooping : 



Heartwood purplish or rose-red Juniperus scopulorum. 



Heartwood yellowish-brown: 



Berries large, mostly over one-fourth of an inch in diameter and 

 bluish : 



One-seeded: 



Seeds round-pointed, furrowed, and creased from top to 



bottom Juniperus utahensis. 2 



Seeds usually chisel-pointed, furrowed only at bottom. 



Juniperus meyalocarpa. 



Several-seeded Juniperus occidentalis. 



Berries small, mostly less than one-fourth of an inch in diameter, 

 and bluish or copper-colored: 



One-seeded Juniperus monosperma. 



Several-seeded Juniperus sabinoides. 



Leaves needlelike, spreading or standing out loosely on the twigs. 



Juniperus communis. 



1 The rare ' ' weeping " form of /. scopulorum may be easily distinguished from J. flaccida by its rose-red 

 heartwood and small bluish berries. 



2 See J. knightii, p. 26. 



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