Erect subwoody shrub up to 0.6 m. tall, often flowering when leafless; young stems tomentose, soon becoming glabrous.. Leaf-blade orbicular or reniform, 6–9 cm. long, 7.5–12.5 cm. wide, acute, rounded or retuse at the apex, velvety-pubescent or glabrescent above, densely velvety-tomentose beneath, sometimes only on the nerves; petiole 6 cm. long, biglandular at the apex.. Flowers solitary, clustered at the apex of the shoots; peduncle 0.5–1.1 cm. long; pedicels up to 2.5 cm. long, very thick in fruit.. Sepals ovate-oblong or elliptic, 1.6–2.3 cm. long, 0.8–1.6 cm. wide, with the outer two a little shorter, obtuse or emarginate at the apex, coriaceous, glabrous or sparsely tomentose.. Corolla opening at night, white, (9.5–)12.5–16 cm. long; tube slender, 8–10 cm. long, 6–13 mm. in diameter; limb salver-shaped, 7.5 cm. in diameter, frilly at the edge.. Capsule ovoid, obtuse or truncate, shortly beaked with the persistent style-base, ridged, 2.2–2.7 cm. long, 1.7 cm. wide.. Seeds ovoid, 1 cm. long, densely covered with purple-brown hairs about 1.8 cm. long.. (Fig. 24/6, p. 131.)
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