28 



BULLETIN 604, U. S. DEPARTMENT OP AGRICULTURE. 



incense cedar, being found throughout the yellow-pine and lower 

 mixed-conifer zones. Other oaks also are found with it, although 

 not so extensively. 



Bigtree or mountain redwood {Sequoia was king toniana) also 

 occurs within the range of incense cedar, and is associated more or 

 less intimately with it wherever found. 



In southern California incense cedar associates most frequently 

 with western yellow, Jeffrey, 'and sugar pine. Here at the upper 

 limits of its range it also mixes with white fir and occasionally with 

 lodgepole or limber pine, while below the commercial timber belt it 

 is found growing with big-cone spruce, pihon, coulter pine, and 

 western juniper. 



STAND. 



Owing to the scattered occurrence of incense cedar, figures as to 

 stand and yield have little general application, since the widest 

 variations frequently occur in the same locality and the species 

 seldom, if ever, predominates in the stand. As an example, how- 

 ever, of actual conditions, the average stand of cedar in the mixed- 

 conifer type on the Plumas National Forest, based on an intensive 

 reconnaissance of 2,200 acres, is given in Table 18. 



Table 18. — Average stand of incense cedar per acre, mixed-conifer type, Plumas 

 National Forest ; average of 2,200 acres, from reconnaissance data. 



1 



Diameter 



breas thigh 



(inches). 



Number 

 of trees 



per acre, 

 incense 

 cedar. 



Per cent 

 of total 

 number 

 of incense 

 cedars in 



each 



diameter 



class. 



Per cent 

 of incense 

 cedar in 

 the stand 



diameter 

 classes 

 based on 

 number 

 of trees. 



12 



0.36 

 .32 

 .36 

 .39 

 .48 

 .45 

 .45 

 .37 

 .26 

 .29 

 .35 

 .17 

 .17 

 .11 

 .01 

 .11 

 .03 

 .06 

 .01 



7.5 

 6.6 

 7.5 

 8.2 

 10.5 

 9.3 

 9.3 

 7.8 

 5.5 

 6.1 

 7.2 

 3.4 

 3.4 

 2.2 

 1.5 

 2.2 



.6 

 1.2 



.0 



21.1 

 20.0 

 23.3 

 24.2 

 24.6 

 27.2 

 23.9 

 21.9 

 22.8 

 23.5 

 27.5 

 20.6 

 27.3 

 19.5 

 16.5 

 33.1 

 13.1 

 30.1 

 5.0 



14 



16 



18 



20 



22 



24 



26 



28 



30 



32 



34 



36 



38 



40 



42 



44 



46 



48 



50 



52 



.01 





12.0 



Total 





4.82 



100.0 



23.1 





Expressed in terms of volume, the average stand of incense cedar was 2,329 feet, board measure, per acre 

 or about 14 per cent of the total volume. 



