328 



THE CULTIVATED EVERGREENS 



bark on lower part of trunk broken into irregular plates covered with thin 

 loose dark brown scales tinged with red, on the upper part and on the branches 

 broken into thin loose scales; branchlets orange-brown; winter-buds cylindric, 

 dark chestnut-brown, very resinous: leaves stiff, usually twisted, acute, dark 

 green, 4-7 inches long: cones usually clustered, oblong-ovoid, oblique at the 



base, chestnut-brown, 2-33^2 inches long; scales of the upper side with elon- 

 gated conical apex terminated by a dark, triangular, spiny umbo, scales of the 

 lower side more flattened, with slender straight spines; the cones usually 

 remain closed for several years after maturity; seeds almost black, 34 inch 

 long. California. — Introduced to Great Britain in 1846 by Hartweg. Hardy 

 only in the Southern States. A handsome pine of regular pyramidal habit 

 when young. 



44. P. rigida, Mill. Pitch P. Fig. 93. Tree to 80 feet tall, with hori- 

 zontally spreading branches forming an open irregular pyramid; bark of old 

 trunk deeply and irregularly fissured into broad flat ridges covered with 

 dark red-brown scales, often tinged purple, on young stems thin and broken 

 into plate-like scales; branchlets light brown; winter-buds ovoid or ovoid- 

 oblong, chestnut-brown: leaves stiff and spreading, acuminate, dark green, 

 2-5 inches long: cones almost sessile, often in clusters, ovoid, light brown, 

 2-4 inches long; apophysis little elevated; umbo triangular, ending in a 

 slender, recurved prickle; seed dark brown, }/i inch long, its wing ^ inch 



