Fig. 1 1.7 1 Diagram to illustrate diversity of pollination types in the 

 Polemoniaceae. Flowers exemplify structural types associated with the 

 various systems of pollination; arrows indicate possible directions of 

 evolution of pollination systems. {After Grant, unpublished.) 



BAT POLLINATED 



(Cobaea scandens) 



HUMMING BIRD FLOWERS 

 (Ipomopsis aggregata) 



SELF- 

 POLLINATING 

 FLOWERS 



CLEISTOGAMOUS FLOWERS 

 (Polemonium micranthum) 



269 



