Specimen courtesy of Plant Resources Center, The University of Texas at Austin- annual with hairless stems 1-21/2 feet tall
- leaves simple, clasping the stem, obovate in outline, 2-3 inches long with a grayish waxy bloom
- flowers in racemes, with four white petals and four purplish sepals
- fruit pods very slender
- known in Texas only from Rio Grande delta
- several collections from brush stands along Arroyo Colorado in Harlingen
- not seen in Texas in several decades
- occurs at higher elevations in Tamaulipas
Specimen courtesy of Plant Resources Center, The University of Texas at Austin