SELECTIVE FERTILIZATION. 



IJI 



ous pollen to bring about fertilization when acting in competition. 

 Fig. 2 shows a pair of mature pistillate inflorescences resulting 



FIG. 2. Mature inflorescences resulting from the application of a mixture 

 of pollen from the two kinds of plants which produced them. (About three 

 fourths natural size taken on orthochromatic plate with Wratten C blue 

 color filter.) 



