35^ Forestry Quarterly. 



growth consists of snow brush, chinquapin, manzanita, etc., and in 

 places a ground cover of squaw carpet, (Ceanothus prostratus), 

 or kinnikinic. After severe burns a more or less dense growth 

 of snow brush usually comes in. This is followed sooner or later 

 by reproduction of tree species, the length of time required to 

 reestablish the forest growth depending on the various factors of 

 site quality, extent of burned area, species reproducing, etc. 



Yellow pine and White fir are numerically the most important 

 species and vary in their relative proportions from pure Yellow 

 pine on some of the lower slopes and flats to the pure fir type of 

 the upper slopes where White fir constitutes over 50% of the 

 volume. On the drier sites White fir commonly occurs in pure 

 clumps scattered through the Yellow pine stand. On north 

 slopes, in most canyons and at the higher elevations it grows 

 in pure stands, or as scattered individuals in mixture with other 

 species, the characteristic "clump" type of the lower slopes being 

 absent. 



For the region as a whole White fir comprises probably 25% 

 of the total stand, and must, therefore, be considered as one of 

 the important species to be dealt with in the management of the 

 forest. 



From the economic standpoint of lumber production White 

 fir is at present considered as a forest weed. On timber sales 

 in this region the primary object in handling White fir is to re- 

 duce its volume in the future stand, but in spite of the induce- 

 ments offered the operator to cut this species, a large percentage 

 of it will be left. In addition to the defective, old timber that 

 remains uncut, there is also a considerable amount of advance 

 reproduction so that it is doubtful whether under the present 

 methods, the volume of White fir in the next stand will be ap- 

 preciably less than in the present. 



So far the only White fir cut has been on the lower slope type 

 where it occurs in relatively small quantities, in mixture with the 

 valuable Yellow pine. On such areas it may be possible to im- 

 prove the stand. But at the higher elevations which are nat- 

 urally unsuited to Yellow pine and where White fir forms a large 

 part of the stand, this species must necessarily be retained as a 

 constituent of the commercial forest. 



The conditions here outlined are more or less typical of the 



