Annual or short-lived perennial herb. Stems usually branched, often shortly creeping at base, erect above, to 40 cm tall, sometimes pinkish. Leaves decussate, sessile, lanceolate to ovate or oblong-lanceolate, to 20 mm long, obtuse or truncate, the base cuneate to cordate. Bracts leaf-like on main stem; on lateral branches bracts smaller, to 6 mm long, obtuse or truncate; bracteoles lanceolate to oblong-ovate, usually as long as flower, attenuate at apex, midrib usually present. Hypanthium campanulate, c. 1 mm long; appendages 3, rarely 4, usually 2-3 times as long as sepals, filamentous. Sepals 3, rarely 4, shallowly triangular, to 0.5 mm long. Petals 3, rarely 4, elliptic, usually 2-3 times as long as sepals. Stamens 3, rarely 4, inserted near base of hypanthium. Style to 0.5 mm long. Capsule globose, to 1.5 mm diam., opening by 3 valves.
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