20 



Figure 7. 

 Proserpinaca palustris: A. habit of plant, upper por- 

 tion with terrestrial growth form, x V^. B. habit of ter- 

 restrial form with pinnatifid leaves, x ^/2. C. side and 

 top views of fruits, x 2. 



Proserpinaca pectinata: D. habit of terrestrial growth 

 form, X 1/^. E. habit of submersed plant, x i^. F. fruit, x 2. 



