72 HARDY CONIFEROUS TREES. 



specimen of regular outline, except for the upper branches, 

 which project here and there beyond those further down, 

 and the plurality of leading shoots. The young shoots of the 

 present tree are flattish on one side, while those of P. ajanensis 

 are rounded or cylindrical. 



P. Breweriana, Watson. North Carolina, Siskiyou 

 Mountains. This is one of the most locally distributed of all 

 the spruces. It differs from every other in the long pendulous 

 branchlets, which hang thin and flexible from the main branch 

 to a great length. The bark becomes of a warm reddish tinge 

 with the advance of years ; and the leaves, which resemble 

 those of the Norway spruce, but of a lighter green, are scarcely 

 I inch long, blunt, thick, and rounded. The cones are re- 

 markably thin for their length, which is usually about 3 inches. 



P. Eng'elmanni, Engelmann. {Synotiyms : Pinus 

 commutata, Parlatore ; Abies Engelmanniiy Parry.) Rocky 

 Mountains of Montana, Oregon, South to Arizona. 1864. 

 This tree resembles the black spruce of Eastern America, for 

 which it was mistaken by all botanical travellers in the Rocky 

 Mountains, until Dr. Parry detected its specific distinctions, 

 and dedicated it to the distinguished botanist whose name it 

 bears. In this country it forms a neat specimen of broadly 

 conical outline, the branches being stiff, and the long foliage, 

 sharply pointed and dull green of colour. The cones nearly 

 resemble those of the better known P. sitchensis^ and are 

 about 2 inches long. 



P. Eng^elmanni gflauca is, in so far as ornamental 

 properties are concerned, a far more desirable tree than the 

 species. It is undoubtedly one of the most beautiful of all 

 the spruces, the general habit being that of the parent, but 

 the foliage, instead of being of a dull green, is distinctly 

 glauscescent almost to silvery whiteness. It is very hardy, 

 and in the younger stages slow of growth, with dense, stiff, 

 horizontal branches, and stout, sharp-pointed leaves, which in 

 their shade of silvery-green vary to a great extent. In many 

 collections P, pungens glaiica does service for the present 

 variety. 



