326 PHANEROGAMIA. 



2. F AGON I A, Tourn. 

 1. Fagonia aspera, Gay. 



Fagonia aspera, C. Gay, Fl. Chil. 1, p. 470. 



Hab. Peru, in uplands, near Yanga. (A very small, diffuse form, 

 appressed to the ground.) 



3. LA It BE A, Cav. 

 1. Larrea diyaricata, Cav. 



Larrea divaricata, Cav. Ic. PI. 6, t. 560, f. 1; Hook. & Am. Bot. Misc. 3, p. 166; 

 Gay, FL Chil. 1, p. 473. 



Hab. Rio Negro, North Patagonia : where it is a common bush on 

 the sandy plains. 



This is the species to which our northern Larrea Mexicana is most 

 related. The leaves are by no means villous, as they are described ; 

 but the younger ones are more or less silky-pubescent; the older are 

 glabrate. 



