Si8 



BOTANY OF CROP PLANTS 



probably originally came from Mexico. Watt says: "I am convinced that 

 the best Upland cottons would be more correctly described as cultivated states 

 of this plant (G. mexicanum), rather than as forms of G. hirsulum." He con- 

 siders many of our Upland or short staple cottons as hybrids of G. mexicanum 

 and G. hirsulum, sometimes with the characters of the one predominating, 

 sometimes with those of the other. The long staple Upland series, chief 



Pig. 214. — American upland cotton (Gossypium hirsutum). (After Walt.) 



representatives of which are Allen, Peeler, Simms and Sunflower, are also 

 hybrids, with hirsutum characters dominant. 



Section IV. Naked-seeded Cottons with the Bracteoles Free or Nearly so and 

 Glands Conspicuous. — This section includes both Old- and New- World forms. 

 The seeds are naked or nearly so, and the lint is easily removed. There is 

 always some fuzz on the seed at the apex, hence they are not absolutely 



