Caucanthus auriculatus Nied.

Climber up to 5 m. in length; younger stems densely covered with short soft white sericeous hairs, older stems very finely pubescent or glabrescent.. Leaf-lamina ovate-cordate, 6–12 × 4–9.5 cm., acute to shortly acuminate, membranous, pubescent or glabrescent above, grey-tomentose beneath and with 2 large glands near base (usually concealed by the indumentum); petiole 1–3 cm. long, densely sericeous with usually 2 small glands above the middle.. Flowers in dense axillary and terminal corymbs, ±1.5 cm. in diameter, evil-smelling; peduncles and rhachis sericeous; pedicels 1–1.5 cm. long, sericeous; bracts ovate; bracteoles lanceolate or linear-subulate.. Sepals broadly ovate from a narrowed base, 2–2.5 mm. long, sericeous outside.. Petals pale yellow, ovate, 6–7 mm. long, shortly clawed, carinate, subhastate at the base, usually reflexed.. Stamens with sub versatile oblong anthers 2.3–2.5 mm. long; filaments somewhat fleshy.. Ovary densely sericeous; styles 2.5–3 mm. long, fairly stout, sericeous.. Lateral wing of samara oblong-elliptic or oblong-obovate, 1–2 cm. in diameter, with entire margins; dorsal wing absent.. Fig. 8.