22 



TREES OF NORTH AMERICA 



often remaining closed on the branches for many years ; seeds oval, compressed, \' 

 long, with a thin brittle rough nearly black shell, their wings light brown, longitudi- 

 nally striped, broadest above the middle, gradually narrowed and oblique at the 

 apex, V long and %' wide. 



A tree, 80-100 high, with a tall trunk usually 2-3 but occasionally 5-6 in 

 diameter, spreading branches forming a regular narrow open round-topped head, 

 and slender branchlets light or dark orange color, at first often covered with a glau- 

 cous bloom, ultimately dark red-brown. Bark of the trunk l^'-2' thick, dark red- 

 brown, and deeply divided into broad flat ridges broken on the surface into thick 

 appressed plate-like scales. Wood light, soft, not strong, brittle, close-grained ; 

 occasionally used as fuel. 



Distribution. Only in a narrow belt a few miles wide on the California coast from 

 Pescadero to the shores of San Simeon Bay, on the islands of Santa Rosa and Santa 

 Cruz of the Santa Barbara group; and on Guadaloupe Island off the coast of Lower 

 California ; most abundant and of i\$ largest size on Point Pinos south of the Bay of 

 Monterey. 



Largely planted for the decoration of parks in western and southern Europe, 

 occasionally planted in the southeastern states and in Mexico, Australia, New Zea- 

 land, and other regions with temperate climates, and more generally in the coast 

 region of the Pacific states from Vancouver Island southward than any other Pine- 

 tree. 



22. Pinus attenuata, Lemm. Knob-cone Pine. 



Leaves slender, firm and rigid, pale yellow or bluish green, marked by numerous 

 rows of stomata on their 3 faces, 3'-7', usually 4'-5' long. Flowers : staminate 



orange-brown; pistillate fascicled, often with several fascicles on the shoot of the 

 year. Fruit elongated, conical, pointed, very oblique at the base by the greater 

 development of the scales on the upper side, whorled, short-stalked, strongly reflexed 

 and incurved, 3'-6' long, becoming light chestnut-brown, with thin flat scales rounded 

 at the apex, those on the outer side being enlarged into prominent transversely flat- 

 tened knobs armed with thick flattened incurved spines, those on the inner side of 

 the cone slightly thickened and armed with minute recurved prickles, persistent on 

 the stems and branches for thirty or forty years, often becoming completely imbedded 

 in the bark of old trunks and usually not opening until the death of the tree ; seeds 



