Class XXL Order IX. 35 



The branches of the double Spruce are thickly covered on 

 all sides with short, dark coloured, linear leaves, inserted later- 

 ally and singly. The cones are small, oval, pendulous, compos- 

 ed of thin scales, which are waved and crenate, or partially cleft 

 on the edge. 



This tree is not very common, unless cultivated, in the en- 

 virons of Boston. At the eastward it is frequent. Its wood is 

 light, strong, and elastic, and much used for the smaller spars 

 of vessels. 



PINUS CANADENSIS. L'. Hemlock Spruce. 



Leaves solitary, flat, denticulate, nearly in two 

 rows ; cones ovate, terminal, hardly longer than the 

 leaves. Lamb. 



Syn. ABIES CANADENSIS. Mich. 



The Hemlock occurs pretty frequently in woods in the vi- 

 cinity of Bostin. It is a straight tree, remarkable for the hori- 

 zontal arrangement of its branches and leaves. The leaves are 

 jn two rows, close, linear-oblong, obtuse, nearly flat beneath, a 

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

 found ec'ged with minute teeth. Cones ovate-oblong, very 

 smaU. 



The wood of the Hemlock is occasionally substituted fov 

 Pine, to which it is inferior, in building. The bark possesses 

 the tanning principle in great perfection, and is used in the pre- 

 paration of leather, as a substitute for, or in combination with 

 the bark of the oaks. 



PINUS MICROCARPA. Lamb. Red Larch, Hacmutack. 



Leaves fascicled, deciduous ; cones roundish, 

 few flowered, with inflected scales ; bractes ellip- 

 tic, obtusely acuminate. Lamb. 



Syn. LARIX AMERICANA, Mlcfi. 



