Herbaceous vine; stems up to 2 m long; young branches retrorsely pubescent, glabrescent. Leaves: petiole 0.4–1 cm long; lamina of lower leaves broadly triangular-ovate, 4.5–8.5 cm long, 2.5–4 cm wide, upper leaves linear-lanceolate, 7–19.5 cm long, 0.4–2 cm wide; appressed pubescent, glabrescent above, pubescent with straight and hooked hairs below; base cordate; apex acuminate to attenuate. Flowers solitary, leaf-opposed or occasionally in axillary racemes. Calyx creamish with maroon to brownish veins and bright yellow to gold inside, pubescent outside; utricle 7–13 mm long; tube 20–25 mm long; lobes spreading to erect, triangular, 3–5 mm long, dark maroon on revolute margin, bright sulphur-yellow inside; apex obtuse. Fruit globose to obloid, 1.5–2 cm long, 1–1.5 cm diam. Seed triangular, 5–6 mm long, 4–5 mm diam., 1–1.5 mm thick, convex on one side, deeply grooved on the other, smooth.
Home