United States, Texas, Presidio, Chinati Mtns State Natural Area. At the Cienega, a large alkali seep SW of Sierra Parda.
29.90528 -104.56667
Basin covered with Distichlis spicata, Scirpus, Sporobolus, numerous other grasses and Cyperaceae, with Typha in the wettest spots. Erect annual in fine-grained wet soils at edges of Cienega. Scattered.