27 
this, however, I was much mistaken, as eight species, apparently 
hours I passed through a small area of a large columnar Cereus 
quite distinct from the one socommon at Andalgala. The small 
area of this encountered here was the only one seen on the entire 
divide at an altitude of about 7,000 feet, descending into a high 
shallow valley, running in a north and southerly direction. 
Crossing it another range of a less rocky nature was crossed and 
descent was made into a long, more grassy canyon. After hours 
of riding in which one other species of cactus was seen, we entered 
s 
ches were to ee seen as far as the eye 
could see to the bourh: while the view northward indicated more 
fertility. Just before night we reached the large house of the 
attend to the night before. After coffee and the well wishes of 
my host we Lepeeias on the long seventy-five-kilometer stretch 
that lay befor Passing northward and down stream the 
vegetation was ni different from anything I had as yet seen. 
e 
practically all strangers to me and I was loath to pass by them 
without making a collection. A short cylindrical cactus was 
