'2i\ I 



01 ri i\i OK PI w l' 01 OOH M'H> 



,,, ^hich, Oriiaba, ovej 18,000 feet elevation, ia the highest peak 



,„ \,„il, \ni.ii, itli of Ul SKA, Mir Important faCtOl - in phut 



distribution 



With such great range In elevation, and also great difference* oi 

 rainfall, it li not remarkable that the Mexican flora la a verj 

 cvini -n .- one 



Northern Mexico, In common with the southern plateau region 

 of the United States, has a scanty rainfall, and a vegetation de 



cidedl^ \ rophyi in ch t. in which Cacti form a conspicuous 



in northwest Nfexieo and low,-- California true desert 



\ il over much of th ntry, but southward there 



an u* - v in • ad bel he [topic of Cancel 1 



n bundant summer he country, and 



much more luxuriant than further north, 



R<w owing the plateau, the climate of 



v \ well within the tn is temperate 



.1. 



