United States, Texas, Presidio, Ca. 3.9-4.0 airmiles N to NNW of jct. US Rt. 90 and St. Rt. 17 in downtown Marfa. Northern part of Mimms Ranch (Dixon Water Foundation). Marfa Quadrangle.
30.3653 -104.03905
In clayey-gravelly alluvial soil in and along unshaded bed of wet-weather drainageway (small nameless tributary to Alamito Creek) draining very gently rolling landscape underlain by a mix of Perdiz Conglomerate (a fanglomerate of variable composition) and Quaternary alluvium. Associates included Conyza canadensis, Echinochloa sp., Leptochloa 31906, Persicaria 31909, Xanthium strumarium.