COTTON VARIETIES 



287 



There is much diversity among the semicluster varieties 

 in size of boll, size of seed, and percentage of lint. 



Among semicluster varieties are Hawkins and Poulnot. 



259. Rio Grande group. This is named for one of the 

 earlier varieties, which had almost the same characteristics 

 as the Peterkin, 

 now so exten- 

 sively grown. 

 Among the dis- 

 tinguishing 

 marks of this 

 group are (1) a 

 large propor- 

 tion of lint, 

 usually 35 to 40 

 per cent of the 

 weight of the 

 seed cotton, and 

 (2) small seeds, 

 many of which 

 are nearly 

 naked ; that is, 



thinly Covered FIG. 136. THE PETERKIN TYPE OF COTTON PLANT. 



with short fuzz, 



so that the seeds appear dark or even black. 



The leaves are, as a rule, smaller and supplied with 

 narrower, more sharply pointed lobes than in the case of 

 many other varieties. The bolls are small to medium and 

 the seed small to very small. The branches are usually 

 slender and rather straight, and either medium- or long- 

 jointed (Fig. 136). 



