Bui. 1164, U. S. Dept. of Agriculture. 
Plate V. 
INVOLUCRAL BRACTS OF THE PARENTAL AND HYBRID COTTON PLANTS. 
Two-thirds natural size. 
Fis. L— The Holdo - ihe very deeply toothed bract, with the teeth broad, 
leaflike in texture, and nearly erect. Fig. 2.— The first-generation hybrid, showing the inter- 
medial i of the characters. Fi<;. 3.— The Pima parent." showing the much less 
deeply toothed bract with bristlelike spreading teeth. Figs. 4 to 10.- Second-generation 
hybrid individuals, showing range Of variation as follows: 4 and 8, Range in size of bract and 
number of teeth; 6 and 7. range in width of bract: 5 and ti. range in relative length of teeth 
bran dentation index ; 6 and 10, range in width of teeth: ."> and 7. range in spread of teeth. 
