296 PINACEAE 



PI CEA — continued 



P. hicolor {P. Alcockiana). 80. Ls, h, very crowded, bright glossy green. 



Cone 3 X 1 1, scales slightly toothed. Japan. 

 P. Engelmannii. 100. Branches drooping; branchlets downy. Ls. i, radially 



arranged. Cone 2x1, tapering at top ; scales toothed, cut off square at 



apex. West North America. (Fig. 45 L.) 

 P. excelsa {P. Abies). Common Spruce, Norway Spruce, Christmas Tree. 120. 



Ls. -I, vaguely 2-ranked, deep green. Cone 5x2, cylindrical, tapering 



at top ; scales triangular, jagged at apex. Europe. (Fig. 45 E.) 

 Variety argentea spica. Young shoots creamy white. 

 P. likiangensis. 100. Branchlets brown, bristly, with prominent l.-pegs. Ls. 



2-ranked, \, horny-pointed. Cone 2, egg-shaped, with rounded wavy 



scales. China. 

 P. Morinda (P. Smithiand). Himalayan Spruce. 120. Branches drooping. 



Ls. 2, prickly pointed, radially arranged and directed forward. Cone 



6x2; scales rounded, entire. West Himalaya. (Fig. 45 K.) 

 P. nigra (P. Mariana). Black Spruce. 30. Branches densely twiggy; branch- 

 lets covered with reddish down. Ls. |, slightly curved, dark bluish green. 



Cone I. North America. (Fig. 45 H.) 

 P. obovata. Siberian Spruce. 100. Like P. excelsa, but cones smaller (3), 



and cone scales rounded and entire. North-east Russia and Siberia. 

 P. orientalis. 100. Ls. J, dark glossy green, pressed close to branchlet. 



Cone 2, scales toothed. Asia Minor and Caucasus. (Fig. 45 j.) 

 P. polita. Tiger- tail Spruce. 120. Branchlets creamy yellow, hairless. Ls. 



if, sabre-like, stiff and prickly, curved and hollowed, glossy, radially 



arranged. Cone 4, scales minutely toothed. Japan. (Fig. 45 M.) 

 P. pungens. 100. Branchlets hairless; bud scales recurved at tip. Ls. radially 



arranged, i, stiff, spine-tipped. Cone 4x1, scales coarsely toothed. 



U.S.A. 



Varieties argentea and glauca. Ls. blue-white. 

 Variety pendula. Blue weeping form. 



PINUS. Pines. Branches whorled in young trees; branchlets opposite. Ls. 

 linear, in bundles of two to five. Male catkins yellow or red, clustered at base of 

 either terminal or lateral young shoots ; female egg-shaped, borne at end of lateral 

 young shoots. Fruit a woody cone ; cone scales thickened and bossed at outer end, 

 opening when ripe and allowing the winged seeds to escape. 



I 



I 



{a) Two Is. in each bundle 



Banksiana. Jack Pine, Banksian Pine. 80. E. Buds thickly coated with 

 resin. Ls. i \, bright green, curved and often twisted. Cone i \, curved. 

 East North America. (Fig. 45 n.) 



contorta. Beach Pine. 30. E. Branchlets orange-brown. Ls. 2, dark green, 

 rigid, twisted. Cone 2 X f , unequal-sided. West North America. 

 (Fig. 45 P.) . 



Variety Murrayana. Lodge-pole Pine. Ls. 3, lighter green. | 



halepensis. Aleppo Pine. 50. E. Tree has a bare thin appearance. Branch- 

 lets pale grey; buds without resin. Ls. 4, very slender, bluish green. 

 Cones 3x1, stalked, in clusters, remaining on tree for several years. 

 Mediterranean region. 



