(Trigastrotheca pentaphylla)
Annual up to 24 cm tall. Stem and branches slender, glabrous. Leaves cauline and ramal, pseudo-verticillate, 1.2-4.0 cm long, 1.5 mm broad, elliptic lanceolate. Sepals 1.5-2 mm long, elliptic ovate. Stamens 5, antisepalous, c. 1.2 mm long; filaments dilated at the base, anthers less than 1 mm long, basifixed, dehiscing longitudinally. Ovary sub-globose, c. 1.5 mm broad, Fruit c. 9 mm broad, membranous. Seed less than 1 mm long, granulate, dark brown.