494 
WRIGHT : FOLIAR PERIODICITY 
In 1901 the leaves fell during February and March, and 
the tree was in full new leaf in April. 
In 1904 new leaves were produced before all the old ones 
had dropped. It appears to be very variable at Peradeniya 
and may or may not become leafless. 
In the Bintenne district in 1902, the foliar change took 
place in June, many of the trees being in new leaf and 
others leafless during that month. 
1 .—Ceylon and India. 
Leaf-fall. 
New 
Leafless 
Period. 
Com¬ 
menced. 
Finished. 
Leaves 
appeared. 
Bassia longi- 
— | 
folia, L. ; 
Peradeniya. 
Tree A. 
1 
1901 
Dec. 
4 
Dec. 
31 
_ 
— 
1902 
Dec. 
8 
Jan. 
12 
Jan. 
14 
1 day 
1903 
Dec. 
10 
Jan. 
12 
Jan. 
12 
1904 
Dec. 
12 
Jan. 
2 
Jan. 
3 
— 
Tree B. 
1901-02 
Dec. 
9 
Jan. 
2 
Jan. 
8 
5 days 
1902-03 
Dec. 
16 
Jan. 
6 
Jan. 
14 
7 days 
1903-04 
Dec. 
28 
Jan. 
30 
Feb. 
5 
5 days 
1904-05 
Dec. 
3 
Jan. 
1 
Jan. 
5 
3 days 
New leaves may appear before all the old ones have 
dropped. 
Flowers appear soon after the new leaves. 
During June several twigs drop their old leaves and 
produce new ones. 
The defoliation in 1903-1904 was delayed, probably 
because of dry weather in November-December, 1903, and 
heavy rains in January, 1904. 
At Bibile and Passara some trees were leafless, others 
dropping, and others in new leaf in May and June, 1904. 
