'1'kkf.s of thk XoKTiiKK.N L'mtkd Statks 49 



(i. Larix (Touni.) Adans. Larch. 



Trees with thick wart-like dwarf ])raiiclK-s hearing a 

 cluster of deciduous ueedle-shaped leaves. 



Tall pyramidal, monccious trees with horizontal or 

 ascending hranches : earpellate cones small, erect, with thin 

 woody scales. 



1. Carpellate cones small, l-i in. long, oval or almost 

 globular: ovuliferous scales glabrous: native, grow- 

 ing in bogs and. wet places. L. laricina. 



1. I'arpellate cones rather large. i-L] in. long: ovulifer- 

 ous scales hnely tomentosc on the back, cultivated 

 in dry ground. L. larix. 



I. Larix laricina (DuRoi) Koch. Tanuirack. A 

 slender tree with close (.r at length scaly l)ark. Wood hard. 

 dural)le. and very strong : used in ship-building, for railroad 

 ties, posts, and telegraph poles. In swamps and about the 

 margins of lakes. Newf. to X. W. Terr., south to Minn.. 

 Ind., Ohio, and X. J. 



1. Larix larix ( L. ) Karst. European Larch. A beauti- 

 ful tree with horizontal branches and drooping branchlets. 

 conical in shape when young: much cultivated in some parts 

 of the United States. The source of Venice turpentine. 

 Xative of Europe. 



7. Pinus (Tourn.) L. Pine. 



Evergreen trees with self-pruned dwarf branches bearini.; 

 1-7 needle-shaped leaves. 



Resinous, monecious trees vn ith \ ery small dwarf branches : 

 dwarf l)ranches and ordinary twigs co\ered with scale leaves. 

 Dwarf Ijranches self-pruned after a number of years. 

 Carpellate cones woody with numerous carpels. Our most 

 important lumber trees. 



1. Dwarf branches with •"> f< liage leaves: ovuliferous 

 scales little thickened at the tip. P. strobus. 



1. Dwarf branches with 2-3 foliage leaves: ovuliferous 



scales much thickened at the tip. J. 



2. Dwarf branches with '\ foliage leaves, rarely J or I. :'.. 



