RANGE MANAGEMENT ON THE NATIONAL FORESTS. 95 



district of Oregon, are identified, or at least check-identified, by the 

 authors or prospective authors of floras of those localities, who are 

 botanical authorities for those regions. 



REPORTING ON THE COLLECTIONS. 



In reporting on a collection from Washington a list will be fur- 

 nished of the identifications as determined by the experts, arranged 

 alphabetically according to four groups ; viz, grasses, grasslike plants 

 (mostly sedges and rushes), nongrasslike plants (exclusive of trees 

 and shrubs), i. e., herbs or weeds, and trees and shrubs. 



So far as possible, economic notes for the species in the collection 

 will also be furnished. Notes for the grasses are available in printed 

 form. The notes collated in Washington cover the following points : 

 Range, botanical description, habitat, periods of flowering and of 

 seed dissemination, reproduction, and forage value. While every 

 care is taken to have these notes accurate and helpful, it is obviously 

 impossible for any one man, or even group of men, in Washington, 

 from personal observation or research, to know the habits and values 

 of all the species comprising the forage crop of so vast a region as 

 that covered by the National Forests. Such knowledge is necessarily 

 cumulative, the product of the observations of many men in many 

 fields; its attainment will necessitate the cooperation of the entire 

 field force of the Forest Service. 



MOUNTING FOR THE HERBARIUM. 



- Plant specimens are most convenient for reference when mounted 

 and systematically filed in a herbarium. 



Specimens are mounted by fastening them securely to white card- 

 board or linen-ledger mounting sheets. Some prefer to glue the 

 specimen to the mounting sheet. This method has the advantage of 

 expedition and cheapness, but it causes more or less injury to the 

 specimen, and the specimen can not be removed nor remounted, as 

 is not infrequently desirable, without great difficulty and without 

 injury. The more satisfactory, though somewhat more expensive, 

 way of mounting is to use narrow strips of adhesive tape, prefer- 

 ably surgeon's isinglass plaster (on silk). Thick and heavy mounts, 

 such as woody specimens, may require sewing, or, if desired, the use 

 of fine copper mounting wire, to make them secure. Care should 

 be taken to see that the ends of the specimens are rigid ; and, in 

 the case of twigs and stalks, which, unless properly mounted, are 

 easily pried off or broken in handling, the mounting plaster should 

 be placed close to the cut or broken end of the specimen. The 

 mounting plaster should always be placed at right angles to the 

 stem or other part mounted and be of proportionate width ; it should 

 be pressed firmly to the mounting-sheet surface until -complete attach- 

 ment is assured. Curved botanical forceps or tweezers for exerting 



