ENUMERATION OF CONIFERS 



329 



Pinus attenuata. 



long. Maine to Ontario and Ohio, south to northern Georgia and Tennessee. 

 — Introduced to Great Britain prior to 1759. Hardy as far north as eastern 

 Canada. Of rapid growth when young and valuable for planting on dry and 

 rocky soil; old trees are often very picturesque. It sprouts readily from 

 stumps when cut down or partly destroyed by fire, but the sprouts are short- 

 lived and never develop into trees. 



Var. serotina, Loud. (P. serotina, Michx.). Pond P, (Marsh P.). 

 Usually a tree 40-50 feet, or occasionally to 80 feet tall, with stout, often 

 contorted branches form- 

 ing an open round-topped 

 head ; bark shallowly 

 fissured into small plates; 

 branchlets dark orange, 

 later dark brown: leaves 

 3, rarely 4, slender, 6-8 

 inches long: cones ovoid, 

 2-23^ inches long, with 

 slender, incurved, mostly 

 deciduous prickles ; seed 

 J^ inch long. New Jersey 

 to Florida and central 

 Alabama. — Little known in cultivation and probably not hardy north of the 

 Middle Atlantic States. 



45. P. radiata, Don (P. insignia, Douglas. P. montereyensis, Hort.). 

 Monterey P. Tree to 80 or 100 feet, or to 140 feet under favorable conditions 

 in cultivation, with stout spreading branches forming an irregular, open, 

 round-topped head; bark thick, deeply furrowed into broad flat ridges 

 covered with thick appresscd scales, dark red-brown; branchlets brown; 

 winter-buds ovoid, bright chestnut-brown: leaves acute, bright green, 4-6 

 inches long: cones short-stalked, conic-ovoid, 3-7 inches long, upper scales 

 with elevated, rounded, almost hemispherical and obscurely keeled apex; 

 umbo small, with minute, straight, or recurved prickle, lower scales with 

 almost flattened apex; seed black, H inch long. Southern to Lower Cali- 

 fornia. — Introduced to Great Britain about 1833 by D. Douglas. Hardy 

 only in the Southern States. A handsome species with bright green foliage 

 and of rapid growth when young; valuable for seaside planting. Now ex- 

 tensively planted for reforestation purposes in Australia and New Zealand 

 where it grows more rapidly and taller than in California. 



46. P. attenuata, Lemm. (P. tuherculata, Gord., not Don. P. californica, 

 Hartw., not Loisel.). Knob-cone P. Fig. 94. Tree usually 20, occasionally 

 to 100 feet tall, with slender horizontal branches ascending at the ends, 

 forming a broad pyramid, with open round-topped head in old age; bark of 



