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Leaves opposite or 3-whorled; lamina 3.7–21 × 2.5–18 cm, ovate-orbicular to ovate or broadly elliptic, mostly cordate (sometimes deeply so) or subtruncate (sometimes the two base-types in the same plant) or rounded at the base, rounded and shortly acuminate at the apex (the acumen sometimes cuspidate), usually entire or rarely irregularly crenate, soft or somewhat rigid on drying, slightly pubescent above, more densely so beneath (hairs soft, whitish, denser on the nervation), sometimes nearly canescent or velvety beneath or on both faces; nerves and reticulation somewhat raised beneath; petiole 1–16 cm long.
A soft-wooded somewhat virgate shrub 1–4 m high, sometimes scandent or a liane up to c. 6 m or more, rarely a tree up to c. 8 m tall; flowering branches green-brownish to dark brown, stout, cylindrical, hollow, hispid pubescent, glabrescent; indumentum ± dense of short uniformly patent bristles, sometimes ± sparsely intermixed with longer (up to 2 mm long) bristles, found on the upper part of branches, petioles, the base and margins of inflorescence-leaves and the inflorescence and calyx, sometimes reddish or reddish-yellow on the petioles.
Cymes few-flowered, subumbellately arranged above and axillary below, aggregated into one lax terminal leafy inflorescence up to 17 cm long; peduncles of cymes ascending, those of the supra-axillary-cymes 5.5–8 cm long; pedicels long, those of the flowers in the dichotomies up to 4 cm; bracteoles linear.
Corolla white or creamy-white, sweet-scented; tube 7–10 cm long, slender, glandular-pubescent on the outside; lobes 1.3–2 cm long and 5–9 mm wide, oblong or elliptic, obtuse.
Calyx 1.7–2.8 cm long, obconical at the base; lobes up to 1.5 cm long, and 1 cm wide at the base, attenuate-cuspidate, erect, sparsely puberulous.
Fruit 1–1.5 cm long and 1.2–1.8 cm broad, black when dry.
Stamens and style exserted for c. 3.5 cm.
