EXPLANATION OF PLATE I. 



Solanum rostratum Dunal. 



Fig. 1. Right-handed flower from the front and a little to one side, showing 

 large and small stamens, pistil, and wings of the corolla, which enfold pistil and 

 large stamen in the bud. X 2. 



Fig. 2. Tip of a raceme from the front, showing one left- and two right-handed 

 flowers; also the decurved end of the raceme, with the buds. 



Fig. 3. Lateral view of decurved tip of raceme, showing the buds. 



Fig. 4. Lateral view of bud ready to open the following morning, showing the 

 two lower lobes of the corolla, enfolding pistil and large stamen. 



Fig. 5. Ovary and pistil. X 5- 



Figs. 6 and 7. Lateral and dorsal view of large stamen. X 5. 



Figs. 8 and 9. Lateral and dorsal view of small stamen. X 5. 



Figs. 10 and 11. Hind leg of Bombus, with and without mass of pollen. 



