88 GENUS PESrUS 



It grows from the valley of the Yukon, near the Alaskan boundary, along the Pacific coast to 

 Mendocino county, California. It covers the plains and slopes of British Columbia and follows the 

 Rocky Mountains into western Colorado, with an outlying station on the Black Hills of South Dakota. 

 It grows on the Sierras and mountains of southern California and in northern Lower California. On 

 the seashore this Pine is of low dense growth, but inland it is a slender tree with a long tapering stem. 

 It is easily recognized by its very short leaves and very small cone. 



Plate XXXV. 

 Fig. 305, Cones. Fig. 306, Leaf -fascicle and magnified leaf -section. 



59. PINUS GREGGII 



1868 P. Greggii Engelmann ex Parlatore in DC. Prodr. xvi-2, 396. 

 Spring-shoots uninodal and multinodal, pruinose. Bark-formation late, the branches and upper 

 trunk smooth. Leaves ternate, from 7 to 10 cm. long, erect; resin-ducts medial, hypoderm of uni- 

 form thin-walled cells. Conelets mucronate. Cones from 6 to 12 cm. long, ovate-conic, oblique, 

 serotinous, reflexed; apophyses lustrous tawny yellow, convex, the posterior gradually larger and 

 more prominent than the anterior scales, the umbo flat or depressed, the mucro deciduous. 



This species is known, at present, from specimens collected in the vicinity of the city of Saltillo, in 

 northeastern Mexico. Were it not for the difference of bark it might be considered to be a north- 

 em variety of P. patula with shorter erect leaves. With both species the long peduncle of the conelet 

 becomes overgrown by the basal scales of the ripe cone, which appears to be sessile. With both, the 

 cones are in crowded nodal clusters, reflexed against the branch. They are so much alike that earlier 

 descriptions of P. patula included the smooth gray bark of P. Greggii. The first correct description 

 of the scaly red bark of P. patula appeared in the second edition of Veitch's Manual of Conifers. 



Plate XXXVI. 



Fig. 311, Cone. Fig. 312, Conelet. Fig. 313, Leaf-fascicle and magnified leaf-section. 

 Fig. 314, Branch showing erect leaves. 



60. PINUS PATULA 



1831 P. PATULA Schlechtendal & Chamisso in Linnaea, vi. 354. 

 Spring-shoots multinodal, more or less pruinose. Bark-formation early, the scales deciduous, the 

 upper trunk and branches red. Leaves prevalently ternate but sometimes in fascicles of 4 or 5, from 

 15 to 30 cm. long, slender and gracefully drooping; resin-ducts medial or with an occasional internal 

 duct, hypoderm weak, of uniform thin-walled cells. Conelets mucronate. Cones from 6 to 11 cm. 

 long, in crowded verticillate clusters, sessile, reflexed, ovate-conic, oblique, persistent and serotinous; 

 apophyses lustrous nut-brown, more or less tumid, the posterior gradually larger than the anterior 

 scales, the umbo flat or depressed, the mucro wanting. 



Patula grows in the warm-temperate climates of Hidalgo, Puebla and Vera Cruz, in eastern and 

 central Mexico. It can be at once recognized by its slender drooping foliage, its persistent cones, 

 and its red upper trunk. It is cultivated in northern Italy and in the warmer parts of Great Britain. 



Plate XXXVI. 



Fig. 307, Cone. Fig. 308, Conelet. Fig. 309, Leaf-fascicle and magnified leaf-section. 

 Fig. 310, Branchlet with drooping leaves. 



61. PINUS MURICATA -J^ 



1837 P. MXJRiCATA D. Don in Trans. Linn. Soc. xvii. 441. 

 1848 P. Edgariana Hartweg in Jour. Hort. Soc. Lond. iii. 217. 



Spring-shoots multinodal. Leaves binate, from 10 to 15 cm. long; resin-ducts medial, hypoderm 

 biform. Scales of the conelet prolonged into a triangular spine. Cones from 5 to 9 cm. long, in ver-- 

 ticillate clusters, sessile, reflexed, ovate-conic, oblique, serotinous; apophyses lustrous nut-brown, 



