CLASS XXI. ORDER IX. 387 



Syn. Abies Canadensis. Mich. 



The Hemlock spruce occurs frequently in woods in the vicinity 

 of Boston. It is a straight tree, remarkahle for the horizontal 

 arrangement of its branches and leaves. The leaves are in two 

 rows, close, linear-oblong, obtuse, nearly flat beneath, a little 

 convex above. When examined with a glass, they are found 

 edged with minute teeth. Cones ovate-oblong, very small. 



The wood of the Hemlock is occasionally substituted for Pine, 

 to which it is inferior, in building. The bark possesses the tan- 

 ning principle in great perfection, and is used in the preparation 

 of leather as a substitute for, or in combination with the bark of 

 the oaks. 



PiNus MicRocARPA. Lamb. Red Larch. Jfacmaiaik. 



Leaves fascicled, deciduous; cones roundish, few 

 flowered, with inflected scales; bractes elliptic, ob- 

 tusely acuminate. Lamb. 

 Syn. Larix Americana. Mich. 



The Larch is a fine tree, differing remarkably from the Pines, 

 already mentioned, in its leaves, which fall at the approach of 

 winter. They grow in tufts or fascicles, on the sides of the 

 branches, which are mostly horizontal. The tree flowers with 

 small aments, the barren ones containing two anthers under 

 each scale, and the fertile ones two germs. These last are 

 succeeded by small cones, with soft scales, inflected at the edge. 

 Seeds small, winged. This tree attains the height of eighty or 

 ninety feet. Its wood is strong and durable, and is used in ship 

 building. It frequents a low, moist soil. 



398. CUPRESSUS. 



CuPRESsus THUYoiDEs. L. White Cedar. 



Branchlets compressed ; leaves in four rows, imbri- 

 cated, ovate, tuberculated at base. Willd. 



The White Cedar grows naturally in wet situations, some- 

 times occupying considerable tracts of marshy land, known by 

 the name of Cedar swamps. The small branches are finely sub- 

 divided, their last divisions compressed, and covered by four 



