Perennial herb, up to ± 0.6 m high, covered with brownish or greyish hairs. Stems erect to decumbent. Leaves with blade linear to linear-oblong, base hastate or sagittate to palmately 5-fid, 9-30 x 2-8 mm, thick, margins revolute. Flowers: peduncles 1-or 2-flowered; calyx lobes ovate to oblong, apices acute to acuminate, densely tomentose; corolla 12-20 mm long, lobes distinctly acute, white or pink, with dark reddish purple centre; Oct.-Apr. Fruit a globose to ovoid-conical capsule with apex glabrous or hairy.
Leaf lamina linear to linear-oblong, rhomboidal, ovate-oblong or palmately 5-fid, sometimes emarginate or sagittate with basal auricles, often bifid, subtruncate or cuneate, usually acute, 9–35 × 1–25 mm., nearly sessile, thick, with stout midrib and the lateral nerves impressed above and prominent below, covered (as are peduncles, bracts, pedicels, calyx and midpetaline zones) with same brownish or greyish tomentum as the stems (often bullate or plicate in var. ornatus).
Peduncles up to 5 mm. long, 1 (2) flowered, shorter than the leaves and up to about 30 mm. long; bracteoles small, linear or subulate, about 3 mm. long; pediclels usually longer than the peduncles and up to about 15 mm. long.
Sepals about 6 (10) mm. long, oblong, elliptic or ovate, acute or somewhat acuminate, rarely obtuse, the outer ones completely covered with the tomentum on the outside, inner ones with a median hairy zone.
Stems several from the base, densely brownish, greyish or sericeo-tomentose, more rarely white pubescent, up to about 60 cm. high.
Corolla white or pink, with a dark reddish-purple centre, widely funnel-shaped, about 12 mm. long.
Erect to decumbent perennial forming much branched stems from a woody root-stock.
Capsule ovoid-conical, shortly apiculate, hairy at the apex.
Seeds glabrous.