GIANT BAMBOOS. 
233 
In addition to the figures given in the above table No. 11 
grew 385 mm. from July 6 to 13, an average growth of 
55 mm. per day, and in the same time No. 12 grew 230 
mm., an average of 33 mm. per day. On August 25 No. 11 
showed a further growth of 1,112 mm., being an average of 
159 mm. per day from August 19-25, inclusive. 
Examination of the table will show that in the case of 
Gigantochloa, as well as in that of Dendrocalamus, there is a 
remarkable correspondence between rate of growth and daily 
rainfall. A portion of the curves of growth for Nos. 11 and 
12 is shown in fig. 2. The sudden increase in rate of growth 
accompanying the heavy rainfall on July 30 is very notice 
able. 
In Table VII. under No. 18 is recorded the growth from 
July 26 to August 31 of a culm belonging to another clump, 
probably also of Gigantochloa aspera, but much younger. 
The circumference of this culm was only 26 cm. ; its rate of 
growth during the month of August is relatively slow, and 
this is probably connected with the low rainfall for the 
month, for it is to be noticed that the growth of No. 11 fell 
off considerably about August 17. 
Bamhusa spinosa. —A few measurements of growing 
halms of this species were taken for the sake of comparison 
with the larger bamboos. No. 15 belonged to a very young 
clump, having only a few adult halms ; its circumference was 
140 mm. Nos. 16 and 17 belonged to another much larger 
clump. The circumference of No. 16 was 203 mm.; of No. 17, 
191 mm. The growth of these halms is on the whole some¬ 
what slower than in the case of Dendrocalamus, but it is to be 
remembered that by the time the halms had reached a fair 
height a somewhat dry period had set in. In the case of all 
these halms the rate of growth shows a general agreement 
with the rainfall, whereas the small oscillations in mean 
temperature appear to produce no more recognizable effect 
than in the case of Gigantochloa or Dendrocalamus. 
