m 
WRIGHT : FOLIAR PERIODICITY 
1.—Ceylon and India. 
Leaf-fall. 
New 
Leafless 
Period. 
Com¬ 
menced. 
Finished- 
Leaves 
appeared. 
Remarks, 
.:October 
Nov. 21 
o 
CO 
> 
o 
& 
8 days 
A tree at Vavu- 
V 
.Feb. 
. Feb. 20 
April 
April 7 
April 
April 20 
12 days 
niya shed its 
leaves,March. 
1905. 
.Feb. 25 
Mar. 20 
Mar. 22 
2 days 
Flowers appear¬ 
, Mar 10 
Mar. 16 
April 7[ 
21 days 
ed on March 16. 
j 1 
— 
| 
Shed a large 
number of 
leaves in 
March, 1902. 
deniya. 
1903 
Peradeniya. 
3 901 
1902 
1903 
rata, Roxb. ; 
1903 
bulosa, Hk. ; 
Peradeniya. 
2.—Ceylon, India, and Malaya. 
In this group there are eighteen species which exhibit a 
definite foliar periodicity, fourteen of them becoming 
absolutely leafless for a varying length of time. 
It is noteworthy that here we are dealing with species 
which have a very wide distribution throughout the tropical 
world, and for this reason the following considerations are 
of much importance. 
The range of time for their foliar activities is for most 
of the species limited to our hot dry season, January- 
March ; true, a few commence to drop their leaves in 
