Bouteloua rothrockii (nearly pure) 1,460 Bouteloua rothrockii (mixed with Aristida spp.) 945 Boerhaavia wrightii 660 Bouteloua rothrockii } Bouteloua aristidoides } 525 Aristida divaricata } Aristida bromoides } Kallstroemia laetevirens Tr. Heterotheca subaxillaris Tr. Plantago ignota 15 Fleshy fungi 10 ----- Total 3,615 Eight species of plants represented by seeds. One species of fleshy fungus in addition. DEN 4. September 20, 1918. In _Calliandra_ type. Stony or gravelly soil, red, nearly denuded of grass. Species stored. Grams. Prosopis velutina 190 Mollugo verticillata (pure) 90 Anisolotus trispermus (mixed, but mostly of this genus) 50 Solanum elaeagnifolium (12 fruits) 2 Per cent. Mollugo verticillata (inseparable) 50 } Bouteloua rothrockii 1 } Bouteloua aristidoides 10 } Lepidium lasiocarpum Tr. } Polygala puberula Tr. } Ayenia microphylla 2 } Portulaca suffrutescens 1 } 400 Aplopappus gracilis Tr. } Alternanthera repens 1 } Tridens pulchella 1 } Plantago ignota 33 } Panicum hallii Tr. } Fleshy fungi (puffballs) 2 --- Total 734 Fifteen species represented in addition to the fleshy fungi. No perceptible grass growth from the summer rains here, therefore dependent on a wide variety of scattering plants. DEN 6. October 17, 1918. Mixed type, partially denuded, no growth from summer rains. Sandy soil. Species stored. Grams.