Annual or perennial herbs, blabrous or hairy with ± glandular hairs. Leaves linear-lanceolate, spathulate or ovate-elliptic. Flowers in cymes or panicles, rarely solitary. Bracts herbaceous. Bracteoles absent. Calyx narrowly cylindrical, 5-toothed, many nerved, without commissural nerves. Petals 5. Coronal scales present or absent. Stamens 10. Styles 2. Carpophore present or absent (absent in our species). Capsule oblong to ovoid, dehiscing apically by 4 valves or teeth. Seeds reniform, tuberculate.