WHITE PINE 



Leaves 3 in a long sheath ; 10' to 16' long ; cones 6' to 10' long ; 

 scales prickle-tipped. P. palustris. Long-leaved Pine. 



I Cones Lateral : 



Leaves 3 in a sheath (rarely 2 or 4) ; 6' to 10' long ; cones ovate-ob- 

 long, 3' to 5' long ; scales with stout recurved prickles. 



P. taeda. Loblolly Pine. 



Leaves 3 in a sheath; 3' to 5' long; cones ovoid-conical or ovoid, i' 

 to 3/^' long, often clustered; scales with short, stout, recurved 

 prickles. P. rigida. Pitch Pine. 



Leaves 2 in a sheath; %' to 2.%' long; cones oblong-conical, in- 

 curved, i^' to 2' long; scales with minute often deciduous prickles. 



P. divaricata. Gray Pine. 



Leaves 2 in a sheath (rarely 3) ; 3' to 5' long ; cones oblong-conical 

 or ovate, i)^' to 2^' long; scales with slender prickles. 



P. echinata. Yellow Pine. 



Leaves 2 in a sheath; \y z ' to 3' long; cones oblong-conical often 

 curved, i^' to 3' long; scales with slender, straight or incurved 

 prickles. P. virginiana. Jersey Pine. 



Leaves 2 in a sheath ; 4' to 6' long ; cones ovate, 2' to 3' long ; 

 scales spineless ; cultivated. 



P. laricio. var. austriaca. Austrian Pine. 



Leaves 2 in a sheath ; 2' to 4' long, twisted, bluish green ; cones ovoid- 

 conic, 2' to 3' long ; scales spineless ; cultivated. 



P. sylvestris. Scotch Pine. Scotch Fir. 



WHITE PINE. WEYMOUTH PINE 



Plnus strbbus. 



Strobus, the name of a Persian tree now unknown. Weymouth is 

 the name common in England because this pine was first cultivated 

 by Lord Weymouth. 



When growing under favorable conditions reaches the height of 

 one hundred and twenty feet with a diameter of three to four feet, 

 rarely, it becomes much higher. Flourishes on sandy soil especially 

 that formed by disintegration of granite rock. Roots stout, horizon- 

 tal, practically imperishable. Branches horizontal and in whorls. 

 Grows rapidly and forms dense forests. Ranges from Newfound- 

 land to Manitoba, south along the Alleghanies to Georgia and south- 

 west to the valley of the Iowa. Ascends 4,300 feet in North Caro- 

 lina and 2,300 feet in the Adirondacks. 



443 



