R.K. Selander, 1954 8 Puebla-Oaxaca Highway, Mexico was in bloom, a candlebra cactus of huge size, a good-sized deciduous tree with white flowers in "puff-balls", some cholla cactus (in Puebla only). At the Puebla-Oaxaca border this forest thins out and a fan-palm is the dominant plant. We stopped at a Mexican hotel in Acatlan for the night. March 16 At a point +/- 10 mi. SE Acatlan and at about the same elevation (9380 ft)² a flock of C. jocosus crossed the road in an area of good cactus forest (Picture of an agave in bloom taken here), after crossing the border the road climbs and winds through pine forest oak-forest mixed with other broad-leaved trees, mostly deciduous. The cactus forest grows locally on the lower slopes. On descending into the Oaxaca Valley the cactus forest is encountered again but is less well-developed than in southern Puebla. It continues to almost to Tequisiotean but beyond (= East) of Nejapa cactus is less dominant as tall deciduous trees appear and the vegetation is much like that in the valley of Tuxtla gutierrez, Chiapas. After crossing the Rio Tehuantepec at Nejapa the road climbs through some more dry pine forest with the cactus forest on the drier slopes. As the road descends again we first noted parrots and Calyutta formosa. We pulled