BOLIVIAN FLOEA. 



367 



of permanent snow. Like the tree-ferns, this palm lies on the verge of the zone 

 of woody vegetation. Despite the great altitude of the plateau, the shores of Lake 

 Titicaca have also some arborescent forms, such, amongst others, as the dwarf olive. 



piiipi^^ 





Above the zone of trees the prevailing form is the llareta, a plant with strong 

 roots, and a dense foliage closely matted together like a yellowish lichen, and in 

 appearance presenting a musty metallic surface. 



