Small liana or subscandent shrublet to 3 m., glabrous, with perennial rootstock; older stem corky, shoots often lenticellate. Tendrils 3–10(–15) cm. Leaf-blades variable (heterophyllous), elliptic to lanceolate or linear-lanceolate, top acute to long-acuminate, base acute to attenuate, margin entire or regularly to irregularly dentate, or leaves pinnately lobed to various depth, the lobes acute to rounded, 2.5–13 by 0.7–4.5 cm.; leaves on saplings, sterile or juvenile shoots often lanceolate to linear, ± deeply pinnately lobed, the lobes broad or narrow, 10–30 by 0.2–2 cm.; petioles 4–12 mm., on juvenile plants 0–4 mm.; glands on petiole absent or 1(–2) pairs at the top; glands on blade-margin several, minute, mostly at the tips of the teeth; stipules subtriangular to linear, ± 0.5 mm. Inflorescences 1–3-flowered; bracts subtriangular, 0.5–1 mm. Flowers glabrous; stipe 6–25 mm. Hypanthium shallowly cup-shaped, ± 3–4.5 mm. wide. Sepals elliptic to oblong, obtuse, 6–11 by 3–6 mm. Petals elliptic to oblong, obtuse, 5–10 mm. long. Corona 5–8 mm. high, composed of threads ± connate at base into a tube 0.5–2 mm., free parts of threads 4–6 mm., inside tube and at base of free threads a zone of short hair-like appendages 0.5– 1 mm. Androgynophore ± 1 mm., filaments 6–10 mm., connate at base into a cup ± 1 mm., often with small lobes on its margin in between the filaments; anthers 2–3 mm. Gynophore 2–2.5 mm.; ovary 2–2.5 mm., ± (3–)4-angled; style 1.5–2 mm.; stigma 2–2.5 mm. across. Fruit ellipsoid-oblong, acute (fusiform), excluding the ± 1 cm. long gynophore 4.5–5 by 2.5–3 cm. Seeds rather few, ellipsoid, ± 8 mm. Fig. 9.