Stems glabrous except for minutely villosulous nodes; tendrils unbranched, less commonly 2-branched. Leaves 3-foliolate, lateral pair of leaflets deeply to nearly completely divided (appearing 5-foliolate), petiolules 1–3(–5) mm, terminal leaflet 3–7 cm, blade lanceolate to narrowly or broadly lanceolate or elliptic-lanceolate, petiolule 5–15 or in fascicles of 2–3. Staminate corollas 4.2–6.3 mm diam. Anther heads 1.4–2.2(–2.8) mm diam., subsessile, consistently ciliate with a ring of short, white hairs arising just inside thecal ring. Fruiting peduncles 10–30 mm. Capsules ovoid, barely oblique-gibbous or not, short-beaked, 15–25 mm, spinules 3–5 mm.
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