ILLUSTRATIONS. 



PLATE. 



PLATE I. Sunflower plant grown in Washington, 1). C., in 1897 Frontispiece 



FIGURES. 



FIGURE 1. Akenes (seeds) of sunflower, showing variations in size and form: 

 , />, c, d, from cultivated plants; e, from wild plants; /, transverse 



section 9 



2. Machine for separating seeds from heads 13 



6 



