GIANT BAMBOOS. 247 
Table XVII. 
Peroen 
No. 9. 
No. 
10. 
No. 14. 
Day. 
Night. 
Day. 
Night. 
Day. 
Night. 
17 
78-4 
6-9 
6*7 
15-5 
» 
8*4 
18 
78-2 
63 
17-3 
6*1 
13-8 
1*6 
9*0 
| 19 
85-6 
8*2 
16-0 
8-2 
14-0 
3-5 
9*1 
^ VI.—DISCUSSION OF OBSERVATIONS. 
1.— Recapitulation. 
In the preceding pages, before describing the result of 
observations on the rate of growth, some account of the 
habit of Dendrocalamus was given. The periodicity in the 
length of successive internodes was illustrated by measure¬ 
ments of a series of culms, and certain irregularities in 
some of these periods were ascribed to mechanical pressure 
and injuries. Unlike the cases observed by Tammes, the 
longest leaf blade occurs higher up the culm than the 
longest internode—a state of things which seems to be clearly 
associated with the function of the leaves at different 
positions, the function of protection being more marked 
below, that of assimilation higher up. 
At Peradeniya the elongation of the halms begins as a 
rule early in June and is nearly completed by the end of 
October. At Buitenzorg on the other hand the buds first 
appear above ground at the beginning of November. This 
very marked alteration in the yearly periodicity of the plant 
following a change of locality from one side of the equator 
to the other is a fact of considerable interest, and none the 
less so because the method of propagation in this case was 
vegetative, namely by cuttings. 
