United States, Texas, Presidio, Chinati Mtns. State Natural Area. At the Cienega, extensive alkali seeps to SW of Sirra Parda and SW quadrant of Natural Area.
29.89917 -104.56306
Boulders and fine-grained pale soils in dense riparian thicket along arroyo which drains the cienega to the W, with Prosopis, Baccharis, Aloysia, Cynodon, Centaurium, Eleocharis, Nicotiana, in the drainage. CD scrub on low hills above arroyo. Weak, erect annual to 75 cm tall. Fls yellow. In sheltered crevice of canyon wall. Uncommon.