Large subscandent shrub with tuberous root; stems stout, subwoody, up to 7.5 m. long, at first tomentose, later glabrescent.. Leaves and flowers borne on short erect shoots.. Leaf-blade broadly ovate, 11–14 cm. long, 7–10 cm. wide, cuspidate at the apex, subtruncate or slightly cordate at the base, glabrous above, minutely pubescent beneath, particularly on the veins when young; petioles up to 6 cm. long.. Flowers in lax cymes; peduncle 2.5 cm. long; pedicels 0.6–1.3 cm. long; bracts large, obovate, boat-shaped, 3.2 cm. long, 2.4 cm. wide, pubescent or glabrescent, deciduous.. Sepals subequal, oblong, 2.3–2.5 cm. long, 1–1.3 cm. wide, obtuse or emarginate at the apex, minutely pubescent, strongly reflexed in fruit.. Corolla white, funnel-shaped, 11–12.5 cm. long; tube cylindrical, 8 cm. long, 1.1 cm. in diameter; midpetaline areas shortly pubescent when young.. Capsule ovoid, brown, 1.8 cm. long.. Seeds ovoid, 1.0 cm. long, with white hairs 1.8 cm. long.
Home