Bui. 1195, U. S. Dept. of Agriculture. 
Plate II, 
it* 
*k^3 W\ . , 
1 
Fig. I. — Pollen of Solanum chacoense. x 50. 
•:<* :• 
-• •* 
• •*• 
Fig. 2. — Pollen of Solanum fendleri. X50. 
