438 A HANDBOOK OF CONIFERS 



head. Bark yellowish or dark reddish brown, breaking up into 

 irregularly shaped scaly plates which become very large and 

 thick in old trees. Young shoots stout, glabrous, orange -brown 

 or greenish at first, but eventually becoming nearly black. In 

 some of the varieties the young shoots are glaucous. Winter buds 

 cylindric, conic, acute, f in. long, scales reddish brown, closely 

 pressed, resinous. Leaves in threes, lasting three years, spreading, 

 densely crowded on the branchlets, rigid, curved, 3-10 in. long, 

 2V-TV in. wide, margins minutely toothed, apex a sharp, horny 

 point ; stomatic lines on each surface ; resin canals median, basal 

 sheath about | in. long. Cones sub-terminal, solitary or in 

 clusters, without stalks or nearly so, spreading or slightly deflexed, 

 ovoid, 3-8 in. long, and 2|-4| in. wide before expansion, light 

 reddish brown, often when falling leaving a few of the basal 

 scales attached to the branchlets ; scales oblong, about 1| in. 

 long and | in. wide, the terminal portion swollen, rhomboidal, 

 transversely ridged, the apex armed with a minute prickle. Seed 

 oval, about | in. long, mottled, with a wing | in. long. 



Several varieties, which by some botanists are kept up as 

 distinct species, have been described. The most distinct, which 

 appear to be connected by intermediates, are the following : — 



Var. arizonica, Shaw. 

 Arizona Pine. 



Pinus arizonica, Engelmann. 



Bark black and deeply fissured. Young shoots glaucous. 

 Leaves 3-5 in a bundle (often 5), very long. Cones ovoid, 2-2| 

 in. long. Confined to S. Arizona and N. Mexico. Apparently 

 not in cultivation, 



Var. deflexa, Shaw. 



P. deflexa, Torrey. 



Bark dark brown or black. Young shoots glaucous. Leaves 

 3 together, 3-4 in. long. Cones small, 3-4 in. long. There is a 

 tree at Kew. 



Var Jeffreyi, Vasey. (Fig. 97.) 



Jeffrey's Pine. 



P. Jeffi-eyi, Greville. Black Pine ; Sapwood Pine ; Truckee Pine. 

 Young shoots glaucous, exhaling an aromatic odour when 

 cut or bruised. Buds stout, reddish brown, non-resinous, with 

 the points of the scales free. Cones large, 5-8 in. long, short- 

 stalked with recurved bosses and prickles. Seed about | in. long. 

 Confined to California. Var. Jeffreyi is fairly common in the 

 British Isles. 



Bot. Mag. t. 8257 (1909). 



