11(1 



small, unopened cotton bolls. The shrubbery in the river bottom 

 is completely covered with what we take to be wild grape vine 

 but which proves to be a broad-leaved bignoniad. Among the 

 lower hills we find a dense growth of horrible Jatropha shrubs 

 and tangled among their bases a peculiar Pedilanthus. Plumieras 

 are also abundant and like the two last-named are capable of 

 yielding some rubber. Every bank is gay with Tribulus and 

 Nyctaginaceae. Asclepiadaceous vines and ipomeas are every- 



FiG. 7. Near the summit of Limon Mountain, Guerrero. 



where. In one of the gulches I found an undescribed species of 

 mulberry. 



The plains and lower hills of this valley are almost exclusively 



