Collected
07 July 1990.
Texas, United States
Locality: Val Verde Co., Hwy 277, 11.2 mi. jct. U.S. Hwy 90 at Del Rio.
Environment description: Gravelly limestone soil. Distrubed area along highway shoulder adjacent to Tamaulipan Thornscrub with Acacia berlandieri, Cercidium texanum, Leucophyllum frutescens.