United States, Texas, Starr, Lower Rio Grande Valley National Wildlife Refuge, Los Olmos Tract, ca. 100 ft. S of boundary line at N edge of tract, ca. 4.7 air miles N to NNE of jct. US Rt. 83 and FM 755 in Rio Grande City. Rio Grande City North Quadrangle.
26.44083 -98.77778
Annual?, corolla ca. 2 cm long or less, greenish yellow, with very narrow entire flange like limb. Frequent in disturbed gravel on recently bladed road through xeric shrubland.