United States, Texas, Presidio, Chinati Mtns. State Natural Area. Pelillos Canyon between the dam and Tinaja Prieta Canyon.
29.86417 -104.46361
Canyon bottom woodland of Salix, Juglans, Cephalanthus and Quercus. Erect multi-stemmed perennial herb 75 cm tall. In fine silty soil of banks above canyon. At Jct. Pelillos-Tinaja Prieta. Rare at this locality. Introduced species.