ABIES LASIOCAEPA HOOK. AND ITS ALLIES. 



181 



longer than those of any other American silver fir then known, or of 

 which he had specimens in his herbarium. They are not longer 

 than some that have come to hand since, but at the time the state- 

 ment was made, it was doubtless correct. 



In the type-specimen of lasiocarpa from Douglas the bark is 

 greyish, with thinly disposed, black pilose hairs. The leaves on a 

 sterile branch, probably, are arranged as in amahilis, i. e., with the 

 uppermost leaves nearly parallel with the long axis of the shoot, 

 their tips being directed towards the end of the shoot, while the 

 leaves on the lower side of the branch spread horizontally, or nearly 

 so, on either side. The leaves vary in size, as mentioned by Hooker, 



Abies lasiocarpa Hook. — Leaves, cone-scales, and seeds, from Douglas' 

 original specimen. 



Plan of leaf-section of A. lasiocarpa Hook., from Douglas' original specimen, 

 magnified; h, hypoderm ; rc, resin canal; e, epiderm. 



and are grooved on the upper surface, with rows of stomata in the 

 groove, and with similar rows of stomata on each side of the 

 prominent midrib on the lower surface. The apex of the leaf is 

 slightly notched in some cases, entire or pointed in others. The 

 buds are very small, globose, dry, and not resinous. There is no 

 perfect cone, but a large number of detached bracts and scales are 

 preserved with the specimen. The bracts measure 9 or 10 mm. in 

 length ; they have a short, somewhat wedge-shaped stalk, expand- 

 ing into a suborbicular blade, denticulate at the margin and 

 prolonged into a long acumen. The scale measures 12 or 13 mm. 



K 2 



