P. PEARSON 1955 Good bunch grass up to Volcan; almost certainly ocales here. Sign at Volcan station says 2460 m., not >= 300 as on British Museum specimens or Thomas papers. Fit labels of my specimens accordingly. A little above Punisnor is a stretch of thorn-tree, saguaro, opuntia, with a sprinkling of bunch grass. Saguaro cactus called "cardón" here. Oct. 4 All morning getting census border etc., then just as I was ready to leave Villazon a carabinero foisted two hatchabackers off on me. They are probably coca smugglers. I explained in time that I was going to set traps and camp out and they said they were accustomed to this, but when I stopped at 5:30, one of them asked where they were going to eat + sleep. I sat through until dark, then took them down to Quilvada Honda when they said there was a hotel. Two short logs of tracks in rocky tota. 25 min. NE Villazon, 12,200 ft. Most of the route here from Villazon has been stoney tota, with one quilvada of thorn, saguaro, + grass. Night cloudy, sprinkles of rain, blacks. There is another Tree Creek west of gujuy, but probably not the one where Simons (or Burdin?) collected. Oct. 5 Tracks were in mostly rocky Boecaria? 1-2 feet tall, with some other pungent totas as well, especially along the bottom of the wash. A few 6-foot thorny bushes, a few clumps of grass, and some short cacti. Tracks caught 4 Pli. darwinii. This locality, 25 min. NE Villazon, is near a few huts and "hotel" known as Quilvada Honda. Drove to Tarija. First part of drive more tota, then good Berreichen including a summit at 13,000 ft. In one/one