Glabrous or sparsely pubescent, ephemeral. Branchlets terete, smooth. Leaves oblong to oblanceolate, obtuse, 5–15 mm long, 1–5 mm wide, vivid green turning yellow-green. Flowers solitary, sessile or shortly pedicellate. Perianth fused for one third their length; lobes triangular, green-yellow outside and green inside. Stamens 4 or rarely 8, alternate with lobes; filaments terete, glabrous. Capsule with 4 bifid valves, often appearing 8-valved; stigma not persistent. Seeds comma-shaped, whitish to hyaline but normally brown along radicle edge and faintly patterned.