Bui. 1134, U. S. Dept. of Agriculture. 



PLATE VI. 



Stigmas and Upper Portion of the Style of Bagged Flowers of Pima 



Cotton. 



These parts, dissected at about 3 p. m. of the day of anthesis from flowers' which [had been 

 bagged to exclude insects, show the locus of automatic deposition of self pollen. The position 

 of the lowest pollen grains indicates the height to which the sheath of the staminal column 

 extended. The upper half of the stigmas is entirely free from p ollen . ( Magnified 10 times . ) 



Photographed by H. F. Loomis. 



