PINACEAE (PINE FAMILY) 



31 



P. rig^da. Pitch Pine. Leaves dark green. Cones ovoid, often in 

 clusters. Scales with a short, stout, and generally recurved prickle. 

 Sandy or barren soil. Very rough dark bark and hard resinous wood. 



P. virginiana, Southern Scrub Pine. Leaves short and in twos. 

 Cones sometimes curved and the scales tipped with a straight or curved 

 awl-shaped prickle. Sterile ground. A straggling tree with spreading 

 branches. 



P. Banksiana, Northern Scrub Pine. 

 Leaves in twos, very short and thick, oblique, 

 divergent, cones conical, the scales pointless. 

 A low tree. Barren, sandy, or rocky soil. 



P. echinata, Yellow Pine. Leaves in twos 

 and threes, slender and with long sheaths. The 

 scales bear a small and weak prickle. A 

 straight tree with dark green leaves. Dry or 

 sandy soil. 



P. resinosa, Red Pine. Leaves in twos, P'nus Banksiana^NoTthem 

 dark green. Cones ovoid, smooth, their scales 

 slightly thickened and pointless. Dry woods. 

 A tall tree with reddish smooth bark and hard wood, 



scrub pine. Twig with 

 staminate flowers. 



LARIX (Larch) 



Leaves many in each cluster, deciduous. Small cones borne 

 laterally at the end of short spurs, developed in early spring. 

 Leaves soft, many in a bundle, developed in 

 early spring. Pistillate cones crimson in flower. 



\^^ L. laricina. Tamarack. A slender tree with 



hard and very resinous wood. Occurs chiefly in 

 cold swamps. 



TSUGA (Hemlock) 



Leaves solitary, flat, whitish along two lines 

 beneath. 



T. canadensis, Hemlock. A tall tree with 



spreading and delicate foliage, bright green above, 



Larix laricina. Tam- beneath. Cones on the end of last year's 



arack, a, staminate •> , ^ t • i j 



twig; b, pistillate branches, maturmg the first year. Leaves petioled. 



twig; c, cone. Cones ovoid. Hilly and rocky woods. 



