COTTON VARIETIES 299 



Allen Long-staple. The plant is tall with long, rather upright 

 base limbs ; the appearance is often that of a semicluster plant. 

 The bolls are small, rather long and slender. The lint is long and 

 fine, but the percentage is low. The seeds are covered with white 

 fuzz. This is a standard variety in the Mississippi Delta. 



Griffin. This long-staple variety differs from many others of 

 the same class in having larger bolls and somewhat longer limbs. 

 However, the lint is weak. 



Blue Ribbon. This is a long-staple variety originated at the 

 South Carolina Experiment Station and adapted to the northern 

 and central portions of the cotton-belt. The length of staple 

 is not equal to that in the Allen variety. The plant is of the 

 semicluster shape. The percentage of lint is somewhat above 

 that of most long-staple varieties. The greatest weakness of the 

 Blue Ribbon is its susceptibility to boll-rot. 



LABORATORY EXERCISES 



1. Write descriptions of at least five varieties of cotton, if 

 available, noting especially shape of plant, size and shape of 

 bolls, relative earliness, and colors of seed. 



2. Ascertain the opinions of several farmers as to which varie- 

 ties are thought to make the largest yields of lint in the locality 

 of the school or near the pupil's home, and report in writing. 



3. Students in advanced classes should make a detailed study 

 of an additional number of varieties ; and of the records of va- 

 rieties as tested at their State Experiment Station. 



LITERATURE 



DUGGAE, J. F. Ala. Expr. Sta., Buls. Nos. 107 and 140. 



HARPER, J. N. S. C. Expr. Sta., Bui. No. 123. 



MAcNiDER, G. M., and others. N. C. Dept. Agr., Bull. Feb., 



1909, pp. 37-63. 



NEWMAN, C. L. S. C. Expr. Sta., Bui. No. 140. 

 TRACY, S. M. U. S. Dept. Agr., Office Expr. Sta., Bui. 33, pp. 



197-224. 

 TYLER, F. K. U. S. Dept. Agr., Bur. Plant Ind., Bui. No. 163. 



