Alkxandkr G. RuTiivr.N 



PLATE VII 



Vegetation of the region about Riohacha. Over large areas the giant cacti and 

 scraggly trees are mostly confined to mounds higher than the surrounding flats, hut 

 on the ridges and terraces with gravelly or stony soil, the dry forest is more evenly 

 distributed. The river valley has an open forest of large trees. 



