Leaves 2·0–9·0 cm. × 2–12 mm., lanceolate-elliptic, generally equalling or exceeding the corresponding internode in length, variable in width.
Flowering shoots robust, erect, often virgate, 20–75 cm. high, leafy below with a solitary flower or branched terminal inflorescence.
Petal-lamina 8–24 × 5–12 mm., obovate, dentate or lacerofimbriate, white or pink.
Calyx bracts 4, 6 or 8, covering about 1/3 of the calyx-length.
Calyx 2·8–4·5 cm. × 4–5 mm., cylindric.
Glaucous herb with a woody stem-base.