Inflorescences numerous, axillary, 1–4-flowered; peduncle 0–1·6 cm. long, greyish-pubescent; pedicels 4–9 mm. long; bracts 1·5–5·5 mm. long, subobtuse at the apex, mucronulate; outer ones greyish-pubescent, inner ones with hyaline margin.
Corolla tubular-funnel-shaped, white tinged with mauve, 2·8–3·7 cm. long; tube cylindric; limb infundibuliform.
Stems erect, slender, up to 45 cm. long, with several erect shoots tufted, somewhat zigzag at the apex.
Perennial herb with a woody vertical rootstock.
Capsule globose, glabrous.
Seeds minutely pubescent.