GROWTH OF MATURE CLUMPS 



27 



5, 1915, while a considerable proportion of the canes were not 

 measured until after this date. The height at the time of the 

 first measurement is given in the first row of figures in the table. 

 Each column shows the growth figures for a single culm during 

 successive weeks, the first space in each column being for the 

 week ending June 12. When measurements were not started 

 until later than June 5, the first measurement of growth is 

 recorded lower in the column, the number of blanks appearing 

 before the first measurement of growth indicating the number 

 of weeks after June 5 that the first measurement was taken. 

 It will be iseen that, as is usual in the growth of plant parts, 

 the rate is at first slow and gradually increases until it reaches a 

 maximum, after which it decreases as the culms assume mature 

 size. The most rapid growth usually occurs nearer the end than 

 the beginning of the growth period and takes place in the 

 latter part of the rainy season. Three of the shoots showed 

 a weekly growth in excess of 3 meters; the fastest rate was 

 3.17 meters, or an average of 45 centimeters a day for a week. 



Table 8. — Growth of culms of Bambusa spinosa, at Division of Investiga- 

 tion, Bureau of Forestry, Los Banos, Laguna, Philippine Islands. 

 Data from report by Ranger Oro. 









Height in 



meters at first measurement. 









.24 



.. 



.29 



.06 



.40 



.u 



.40 



.18 



.31 



.27 







Gi 



-owth in n 



leters during succes 



sive weeks 









.04 

 .13 

 .13 



.48 

 .73 



.03 

 .09 

 .09 

 .16 

 .11 



.09 

 .16 



.20 

 .74 



.82 



.00 

 .02 

 .03 

 .04 

 .04 







.21 



.56 



.84 



1.19 



1.21 



.08 

 .12 

 .14 

 .41 



.81 



- 





" " 









.21 

 .50 

 .59 









, . , . 





.00 







.45 



.29 



.95 



.43 



1. 35 



.11 



1.03 



.02 



1.39 



1.24 



.71 



.85 



1.43 



.83 



1.81 



.15 



1.23 



.10 



2.48 



1.22 



1.11 



1.13 



1.57 



1.10 



2.32 



.31 



1.68 



.54 



2. 45 



1.68 



1.20 



1.51 



1.56 



1.41 



2.19 



.72 



1.65 



.89 



1.88 



1.12 



1.72 



1.67 



1.34 



1.29 



2.97 



.86 



1.76 



.91 



1.99 



2.96 



2.04 



2.76 



1.22 



1.49 



1.33 



1.15 



1.26 



1.56 



2.92 



2.40 



1.81 



2.33 



1.37 



1.87 



.94 



1.20 



1.75 



1.63 



1.84 



1.33 



2.63 



2.02 



1.48 



1.73 



1.02 



1.09 



1.91 



2.44 



1.63 



2.88 



1.58 



2.51 ! 



1.56 



1.89 



1.10 



1.77 



1.96 



2.12 



1.84 



2.42 



2.62 



1.60 : 



1.60 



2.10 



2.15 



2.59 



1.85 



2.18 



1.21 



2.30 



1.75 



1.40 j 



2.85 



2.44 



1.53 



.71 







2.75 

 2.33 

 1.94 

 1.40 

 .80 



1.65 



2.02 

 1.26 



2.93 

 3.05 



2.88 

 1.18 

 .92 



2.34 

 1.54 



.75 



1.79 

 2.09 



2.84 

 1.37 

 1.04 







1.71 



1.05 



.94 



.68 



1.66 

 1.57 

 1.15 



.58 









































Total height. 











23.36 



24. 00 



24.41 



21.10 



1 

 22.41 | 21.66 



24.04 



21.29 



22.31 



23.30 



! 



