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Leaf lamina oblong to ovate, 7–14·5 × 3–11·5 cm., rounded or acute and shortly apiculate at the apex, rounded or cuneate at the base, with deep venation, entire, undulate, sometimes deeply dentate, or deeply trilobed in var. trifida Verdc., upper surface puberulous or tomentose, lower one covered with a dense floccose tomentum or entirely glabrous all over; petiole 1–5 cm. long, biglandular at the apex.
Flowers solitary, showy and scented; peduncle 1·2–4 cm. long, more or less pubescent; pedicel up to 1 cm. long; bracts obovate, foliaceous, 1·6–4 × 1·3–3 cm., tomentose or glabrous, venose, hiding the calyx in the buds, but soon falling.
Corolla funnel-shaped, white, pale rose or purplish at the base of the tube, 9–16 cm. long; tube broad cylindrical up to 2 cm. in diam. and 8 cm. long; limb glabrous save for sparsely lanate apical part of the midpetaline areas outside.
Stems many, stout, unbranched, ridged, angular, woody, tomentose or glabrous.
Sepals elliptic, obtuse, tomentose or glabrous, 1·7–3·2 cm. long.
Seeds ovoid, 9 mm. long covered with long shiny pale tawny hairs.
Erect shrubby herb, up to 2 m. tall, lactiferons.
Capsule ovoid, 3 cm. long, woody.
