Calyx bracts 8 or 10, closely imbricate, covering the calyx nearly to the base of the calyx-lobes, uppermost broadly elliptic, subobtuse, mucronate, margin fringed with short, white hairs.
Flowering shoots robust, virgate, 60–120 cm. high, occasionally branched near base, leafy below, terminating in a generally freely branched inflorescence.
Petal-lamina pure white, turning pink with age, 5·0–8·0 × 3·5–5·0 mm., obovate or rounded, crenulate or shallowly dentate.
Leaves towards the base of shoot 6·5–12·5 cm. × 5·0–9·0 mm., linear; sheath 7·5–12·0 mm. long.
Calyx cylindric or elliptic 1·2–1·8 cm. × 2·5–4·0 mm., lobes c. 6 mm. long.
Stiffly erect herb with a short branched woody base.