174 



TREES OF THE NORTHERN UNITED STATES 



7. Plnus Tseda, L. (LOBLOLLY OR 

 OLD-FIELD PINE.) Leaves in twos and 

 threes, 6 to 10 in. long, with elongated, 

 close sheaths ; slender and of a light 

 green color. Cones in pairs or soli- 

 tary, lateral, 3 to 4 in. long, oblong, 

 conical; the scales having short, rigid, 

 straight spines. A large tree, 50 to 

 130 ft. high, wild from Delaware, south 

 and west, in swamps and old fields. 



8. Plnus ponderosa, Dougl. (WEST- 

 ERN YELLOW OR HEAVY- WOODED PINE.) 



p - Tteda - Leaves in threes, 5 to 10 in. long, from 



short sheaths ; broad, coarse, twisted, 

 flexible, of a deep green color; branch- 

 lets thick, reddish brown. Cones 3 to 

 4 in. long, ovate, reflexed, clustered on 

 short stems. Scales long, flattened, 

 with small, sharp, recurved prickles. 

 A large Pacific coast species, 100 to 

 300ft. high, with rather coarse-grained, 

 hai-d and heavy, whitish wood, and 

 thick, deeply furrowed bark; begin- 

 ning to be cultivated east. 



P. ponderosa. 



9. Plnus palustris, Mill. (LONG- 

 LEAVED OR SOUTHERN YELLOW PINE.) 



Leaves 



3 together in bundles, 10 to 15 in. 

 long, from a long, lacerated, light- 

 colored sheath, of a bright green color, 

 and crowded in dense clusters at the 

 ends of the branches. Cones 6 to 10 in. 

 long, usually cylindric, of a beautiful 

 brown color, with thick scales, armed 

 with very small, slightly recurved 

 prickles. A rather tall pine, 75 ft. 

 high, wild in the Southern States, and 

 cultivated as far north as New Jersey, 

 in sheltered situations. 

 P. palustris. 



10. Plnus rigida, Mill. (PITCH-PINE.) Leaves in threes, 3 to 5 

 in. long, from short sheaths ; rigid and flattened. Cones ovate, 1 in. 



