United States, Texas, Presidio, Ca. 1.7-1.8 airmiles NW of jct. US Rt. 67 and US Rt. 90 in downtown Marfa. SE part of Mimms Ranch. Marfa Quadrangle.
30.32683 -104.041
In grassland on very stony soils on gentle slope of low hill on gently rolling landscape underlain by a mix of Perdiz Conglomerate (a fanglomerate of variable composition) and Quaternary alluvium. Associates included Aristida adscencionis, Boerhavia sp., Bouteloua gracilis, Cooperia sp., Croton pottsii, Euphorbia davidii, Machaeranthera pinnatifida, Melampodium leucanthum, Physaria fendleri, Polygala lindheimeri, Pomaria jamesii, Sida abutifolia, Solanum elaeagnifolium, Talinum angustissimum, Tidestromia lanuginosa.