JUNIPERUS 249 



5. J. utahensis, Lemm. 



Juniper 



Transverse. Growth rings very variable, chiefly thin. Summer wood very 

 thin, of 2-4 tracheids, the transition to the spring wood somewhat 

 abrupt. Spring wood rather open, the tracheids uniform, squarish- 

 hexagonal, often radially compressed, rather large, the walls medium. 

 Resin cells numerous, conspicuous, in very open bands in both the 

 spring and summer wood. Medullary rays very prominent and resin- 

 ous, broad, i cell wide, distant 2-8, more rarely 12, tracheids. 



Radial. Ray cells more conspicuously contracted at the ends and dis- 

 tinctly less resinous than in the preceding, the resin chiefly in terminal 

 masses, equal to 6-10 spring tracheids; the upper and lower walls 

 not conspicuously thickened at the ends of the cells, thickish, rather 

 uniform, obscurely pitted, if at all ; the terminal walls often curved 

 and coarsely pitted ; the lateral walls with oblong pits, often with an 

 obscure border, chiefly 1-2, or in the lowest rays 4, per tracheid. 

 Pits on the tangential walls of the summer tracheids very numerous 

 and large, but less open and prominent than in J. californica. Resin 

 cells about 15 //. wide, very long, 150 /A or upwards of 285 /u., not 

 strongly resinous. 



Tangential. Rays somewhat resinous, the cells thick-walled, chiefly trans- 

 versely oval or oblong, usually broader than in No. 4 and much 

 shortened vertically. 



A small tree 6-9 m. high, with a trunk .60-. 90 m. in diameter. Wood 

 light, soft, close grained, compact, very durable in contact with the soil. 



Relative specific gravity 0.5522 



Percentage of ash residue 0.75 



(Sargent) 



Western base of Wasatch Mountains, Utah, to eastern California and 

 south through the Great Basin to southern California ; the San Fran- 

 cisco Mountains of eastern Arizona (Sargent). 



6. J. sabinoides, Neds. 



Cedar. Rock Cedar 



Transverse. Growth rings very variable. Summer wood rather dense and 

 composed of small tracheids, often double, chiefly much less than the 

 spring wood, into which it passes gradually and which it sometimes 

 equals. Spring wood chiefly somewhat open, but the demarcation 

 from the summer wood obscure. Resin cells numerous, not very 

 resinous or prominent, usually in somewhat compact zones, chiefly of 

 the summer wood. Medullary rays not very prominent, i cell wide, 

 distant 2-8, rarely 1 2, rows of tracheids. 



Radial. Ray cells rather resinous, equal to 5-10 spring tracheids; the 

 upper and lower walls rather thick, variable, frequently pitted ; the 

 terminal walls thin and not pitted except in the marginal cells ; 



