a6 WEST-AMERICAN' 



Group I. Plume-Branched Pines. 



Plumosw. 



Cones oblong, cylindrical, 3 to 5 inches long, pen- 

 dent from the long plume-like branchlets; leaves in 

 5's. Sub-alpine trees of the Kocky Mountains, Great 

 Basin, Arizona, and with a few trees on the Sierra. 



Two Species: 

 No. 6 BalfOUr Pine - P. Balfouriana, Jeff. 



A few trees in sequestered nooks on Mt. Eddy, near 

 Shasta, and in the vicinity of Mt. Whitney. Nearly 

 smooth cones with very small prickles. 

 No. 7 FOXtail Pine - - P* aristata, Engelm. 



Similar, but smaller trees, on a few peaks of the 

 Southern Sierra, but chiefly in Arizona, New Mexico, 

 mountains of the Great Basin, to Colorado. Cones 

 with conspicuous half-inch, bristle-like prickles. 



Croup 2. True Nut-Pines. 



Trees native to dry interior regions; leaves short, 

 white-lined above, and heavy-scented; cones small, 

 globose, on short stems, from which they promptly 

 separate at maturity; cone-scales few, thick, protu- 

 berant, but devoid of prickles; seeds few, large, much 

 used by the aborigines formerly, and by the Spanish 

 Americans at present, for food. Four closely related 

 Species in Two Pairs: 



