. P. PEARSON 1955 Challapata when it gets much sandier. One man in "when asked about the road to Rio Mulatos said it was good but a little sandy. Dozens of places where people had to need Tola and grade to escape from sandy places in the road showed that he was right. Much pampas with Festuca orthophylla and drifted sand, also Tola (mostly quadrangular) and sand, and combinations of these plus ichu and Margyricarpus? Also pampas of dwarf forbes. Many tucos, which they call tojoz or tocoz. A little cultivation, and a little grazing (sheep, burrros, llamas) but mostly tocoz + Tola. A railroad station an hour north of Rio Mulatos had 5 acre-feet of cut + bundled Tola piled up by the trucks waiting to be shipped. Saw a band of 6 vicunas just north of Rio Mulatos and 2 stray vicunas grazing with llamas just south of Rio Mulatos. Gorgeous pampas should have had lots more. Stopped for a couple of hours for showering and doumhy, then drove until 5:30 to 16 mi. ESE Rio Mulatos, 12,700 ft, Potosi. Set one bog of types in Tola + bare story ground (but no rocks shelter or boulders). The Tola 2-3 ft tall and 5 species including Bocchona, nowom-named Bocchina Festuca orthophylla quadrangular, and 2 thorny species, one remnant of Margyricarpus but bigger. Only a couple of clumps of Stypha on the whole line; a few cushion cacti and one lone 8-foot phallic cactus. Saw 3 cars on the road all day. Sept. 19 Night clear, cold, no frost. Temp 6 a.m. +2°. In types nothing; one spring empty. Herd 2 groups of Guanacos, no