Plate 40. High order venation of recent, cleared 

 leaves of the cultivated cocas {Erythroyxlum spp.). 

 Photomicrographs taken without polarized light. Scale 

 markers = lOOyum (micrometers). A. E. novograna- 

 tense var. novogranateme (Colombian coca), Plow- 

 man and Davis 3684. B. E. novogranatense var. 

 truxillense (Trujillo coca), Boeke 854. C. E. novo- 

 granatense var. truxillense (Trujillo coca). Plowman 

 5606. 



340 



