238 



KUMPTA COTTON AND ITS IMrROVEMENT 



Curves showing the frequency distribution of the various breadths and 

 lengths of the central leaf lobe among the plants m a normal field of himjda 

 cotton at Dharwar are shown below (Fig. 4). 



30C 



soo- 



too 



* J ^^ *;S 'l>'* ^^:$l ^^t? *t^ ^'^C? ''^ '^;? ^^ *t? ^^ '^^ ^t^ '^ ''^ 



«0 







;? 



Breadth of tHe m'delte lo6e, (l» ittcheso 



le^^M of ^e /niclJie lole. e /ft f?iiUiJHet^} 



Fig. 4. 



The mean breadth of the central lobe is 34 mm., the mean length is 52 mm.* 



The curve of length is multimodal. The curve of breadth is also, in all 



probabihty, not simple. These, therefore, confirm the conclusion previously 



derived from a consideration of the branching that we have not a single 



varying type, but a mixture of several strains with differing characters in this 



respect. The figures, however, show the extent of variation in these factors 



which may be expected in kumpta cotton grovm under identical conditions. 



(3) The shape of the hracteole. So far as a preliminary study by crossing 



can indicate, the bracteole behaves very similarly to the middle lobe of the 



leaf, and the length and breadth of the bracteole seem to behave as simple 



* I count in each case the lower width or length in each group of measurement as typical 

 of that group. 



