CONIFERE^E. 339 



HAB. Barrens. N. Y. to Car. May. ^. A middle-sized tree, 

 with straggling branches and full of resin. Leaves 1 2 inches 

 long. Cones about 2 inches long. Pitch or Scrub Pine. 



2. P. resinosa Ait. : leaves elongated, in pairs ; sheaths elongated ; 

 strobile ovate-conic, rounded at base, subsolitary, half the length of the 

 leaves j scales dilated in the middle, unarmed. P. rubra Mich. 



HAB. Woods. Can. and N. S. May. *?. A very large tree. 

 Found on the Helderburg mouatains near Albany. 



Norway Pine. 



3. P. banksiana Lamb. : leaves short, in pairs, rigid, divaricate, ob- 

 lique ; strobile recurved, tortuous ; scales unarmed. P. rupestrit 

 Mich.f. 



HAB. Rocky grounds. Subarc. Amer. to Maine. April, May. 

 J? . A small tree, with long spreading flexible branches. 



Scrub Pine. 



4. P. variabilis Lamb : leaves elongated, in pairs and threes, channel- 

 led ; strobile ovate-conic, mostly solitary ; spines of the scales incurv- 

 ed. P. mitis Mich.f. 



HAB, Forests. N. Eng. to Geor. May. T?. A large tree. 



Leaves 4 5 inches long, dark green. Cone solitary, 2 3 inches 



long. Yellow Pine. 



5. P. rigida Linn. ; leaves in threes ; sheaths short ; sterile amenta 

 erect-incumbent ; strobile ovate, scattered or aggregated ; spines of the 

 scales re flexed. 



HAB. Barrens. N. Eng. to Vir. May. ^>. A large tree. 

 Leaves 4 6 inches long. Cones usually clustered, 2 4 inches 

 long. The wood abounds in turpentine. Pitch Pine. 



6. P. serotina Mich. : leaves elongated, in threes ; sterile aments in* 

 cumbent, nearly erect; strobile ovate; spines of the scales straight, 

 slender. 



HAB. Margin of swamps. N. J. to Car. May. T?. A small 

 tree. Leaves 6 8 inches long. Cones larger and more globular 

 than in the preceding. Pond Pine. 



7. P. strobus Linn. : leaves in fives, slender ; sheaths very short ; 

 strobile pendulous, cylindrical, longer than the leaves ; scales loose. 



HAB. Fertile soils. Can. to Vir. May. T?. A very large 

 and valuable tree, sometimes attaining the height of 140 feet. 

 Leaves 4 inches long. Cone solitary, very long. Timber soft 

 fine-grained and light. White or Weymouih Pine. 



** Leaves fasciculate, deciduous. LARIX. * 



8. P. pendula Ait. : leaves fasciculate, deciduous ; strobile oblong ; 

 margin of the scales inflexed ; bracts pandurseform, with the point at- 

 tenuated. 



HAB. Cedar swamps. Can. and N. Y. April, May. *?. A 

 middle-sized tree, which differs from the preceding by its leaves 

 growing in tufts or fascicles, and in their being deciduous, 

 Cone small, covered with soft scales, Hackmatack. Tamarack, 



