58 Apr. 28 U.S. Hwy 90 Nondo, Medina Co., Texas to Del Rio, Val Verde Co., Texas Cloudy but no rain. I could see hills N of Uvalde and entered rolling country W there. There seemed to be considerable brush clearing as a range improvement measure However, areas apparently cleared several years ago were coming back with low shrubs, not grasses. There were good stands of timber along streams in this area. I reached Del Rio shortly after 4:00 and put up for the night. During the night rain fell but I did not judge it sufficient to bring out amphibians so I didn't run the roads. Apr. 29 U.S. Hwy 90, Del Rio to Alpine, Brewster Co., Texas I departed from Del Rio about 9:30 pm and collected plants along the road 3 miles N of there. Last night's rain had soaked in. The plant species collected 3 mi N Del Rio were leguminose shrubs or trees, blackberry, or other plants, seemingly of "Tamaulipan Province" affinities. These prevailed to NW of Del Rio but often were stunted on slopes (the latter rocky with clay? outcrops). Some of the original brush may have been cleared and/or left in stunted condition by overgrazing. In swales and along creeks, mesquite was well developed and ? blackbrush also grew. The growth form of plants and general aspect of upland slopes reminded me of the Sonoran desert vegetation. A mile or two E of Pecos River, I saw first ocotillo plants (in flower at this time) I first saw creosote bush (also flowering) 7 mi. E Langtry. Along a tributary stream which I crossed a mile or so E Langtry was a good development.