- winter annual forming prostrate clumps ca. 1-2 feet in diameter
- leaves in a basal rosette, twice-pinnately compound
- flowers on long pedicels, with 4 yellow petals
- fruit an oblong fleshy pod about 1/2 inch long, pointed at tip
- mostly in naturally disturbed areas on floodplains of major streams (e.g., Nueces River)
- sometimes in ordinary weedy areas
- endemic to South Texas
- records from Cameron, Dimmit, Hidalgo, La Salle, McMullen, Nueces and San Patricio counties
