United States, Texas, San Patricio, On historic floodplain of Nueces River, along ranch road on N side of Rincon Bayou, just W of eastern boundary of McGregor Ranch. Ca. 3.7-3.8 airmiles SSW of jct. US 77 and FM 631 at Odem. Odem Quadrangle.
27.89885 -97.60363
Common in heavy black clay in shade of young weedy mesquite shrubland. In severely grazed pasture. Ground layer dominated by Rumex chrysocarpus. Other associates include Sonchus asper, Lepidium spp., and Ciclospermum leptophyllum.