1918.] The Burmese Sesamum Varieties. 395 
ther catalogued according to the other characters previously 
described. 
4. ABNORMALITIES. 
Any account of Sesamum would be incomplete without 
. 
reference to the peculiar condition often encountered which 
s 
far as is known cannot be ascribed to fungus attack. The 
plants usuaily produce no seed at all in the affected parts, but 
ower down the stem a few capsules are usually found from 
which seed can be obtained. Such seed sown out at Tatkon 
in 1916 did not result in producing a greater number of ‘ green 
flower ‘ plants than the average, and clear evidence of the con- 
dition being inheritable has not yet been obtained. The per- 
centage of such plants in different cultures varies very much: 
counts were made at Tatkon in 1916 when it was found that 
the percentage of green flower plants varied from zero to 
40% in the different cultures. 
__ Field observations do not tend to associate its occurrence 
with'any particular environment. It may oceur badly either 
am or 
mid Burma. Accounting as it often does for the loss of at 
least one-third of the crop it is obviously a matter for careful 
die etion with a view to finding if possible suitable reme- 
ies, 
5. IMPROVEMENT. 
rtan 
peates that the Sesamum flower opens in the very early ok. 
ie 2nd that pollination (self) takes place before six o'clock. 
ut that in many cases the failure of the anthers to rage sd 
Properly may leave an opening for crossing, The single plan 
