Capsule ovoid or cylindrical, subacuminate, loculicidal and septicidal; valves on dehiscence bend marginally inwards exposing placentiferous column.
Corolla 5-lobed; tube much longer than calyx, dilated above, narrow at base; lobes flat, spreading, subequal.
Seeds small, numerous, ovoid or cylindrical, striate, rugose or not.
Erect or suberect, glandular-pubescent herbs or small undershrubs.
Flowers solitary, axillary, pedicellate, often bi-bracteolate.
Calyx 5-lobed, lobes narrowly lanceolate.
Ovary bilocular; ovules many.
Style filiform, subclavate.
Leaves alternate, entire.