'34 



THE COTTON PLANT IN EGYPT CHAP. 



The matter might be of importance with regard to 

 photosynthesis. 



Colour of petal. The limb of the petal, apart from 

 the colour of the basal spot, which we shall discuss shortly, 



FIG. 54. TYPICAL PLANT OF "77." JULY 10, 1909. 



ranges in colour from almost pure white to a rich golden 

 yellow. Each pure strain of cotton has a definite petal 

 colour, which is white to creamy in Uplands and Hindi, 

 while in Egyptian families it ranges from lemon to golden. 



