G. 93] 



CLASSIFICATION AND DESCRIPTION 



to nearly 4 in. long, sometimes in clus- 

 ters ; scales with a short, recurved 

 prickle. A medium-sized tree, 40 to 

 70 ft. high, with hard, coarse-grained, 

 very resinous wood ; found east of 

 the Allegha- 

 nies through- 

 out ; more 

 abundant in 



P. rlgrida. 



11. Pinus Austrlaca, Hoss. (AUS- 

 TRIAN OR BLACK PINE.) Leaves long, 3 

 to 5 in., rigid, slender, incurved, sharply 

 mucronate, of a dark green color ; from 

 short sheaths; 2 together. Cones 2j 

 to 3 in. long, regularly conical, slightly 

 p. Austriaca. recurved, of a light brown color ; scales 



smooth, shining, with a dull spine in 



the center. A large cultivated tree, 



60 to 80 ft. high, hardy throughout. 



Europe.- 



12. Pinus Laricio, Poir. (CoRSi- 

 CAN PINE.) Leaves 4 to 6 in. long, 

 slender, very wavy, dark green ; 2 

 together in a sheath. Cones 2 to 3 

 in. long, conical, somewhat curved, 

 often in pairs. Scales 

 with very small 

 prickles. Seeds rath- 

 er large with broad 

 wings. A tall, open, P. Laricio. 



pyramidal, rapid-growing tree, 60 to 100 

 ft. high, with the branches in regular 

 whorls, spreading and very resinous. 

 Often cultivated. Europe. 



13. Pinus Massoniana, Sieb. (MAS- 

 SON'S PINE.) Leaves in twos, 4 to 6 in. 

 long, rather stiff, concave on one side 

 and convex on the other, twisted but 

 not curved, sharp-pointed, of a fresh, 



