Erect or (usually) scrambling or scandent shrub to 3(–5 if scandent) m tall; young stems green, subglabrous to crisped-puberulous in two bands, soon glabrous. Leaves elliptic or narrowly so (rarely ovate), largest 9.5–28≈(2.5–)3.5–11 cm, apex acuminate to cuspidate, base attenuate, decurrent to the 1–4(–7) cm long petiole, margin entire, glabrous or sparsely puberulous along midrib. Cymes simple, racemiform or with two additional cymes from lower 1–2 pairs of bracts or with 2 racemes from upper pair of leaves to form a paniculate inflorescence 5–25 cm long; peduncle (1–)2–5 cm long; axes with indumentum as stems or upwards with sparse to dense sticky stalked capitate glands; bracts caducous, white, or lowermost pairs foliaceous; pedicels (below bracteoles) 1–4(–7) mm long; bracteoles white, elliptic, 10–17≈5–10 mm, subglabrous to densely glandular-puberulous. Calyx white, 2.5–4.2(–4.7) cm long of which the basal tube 2–5 mm, glandular-pubescent with glands to 1 mm long; lobes linear to narrowly elliptic, acute. Corolla pure white or with tube greenish towards base, cylindric tube 3.5–5 cm long and ± 2 mm in diameter, throat funnel-shaped, 0.7–1.2 cm long and 7–8 mm in diameter at apex, pubescent with curly hairs to 1 mm long; lobes spreading or reflexed, elliptic or narrowly so, 1.8–2.8≈0.5–0.8 cm, subacute to rounded. Stamens exserted, didynamous; filaments 1.8–2.8 and 2.3–3 cm long, glabrous; anthers purple, narrowly oblong, curved, 3–4 mm long, connective and sides of thecae with dense short-stalked capitate glands. Capsule 2.3–3.5 cm long, 2-seeded, seed-bearing part broadly ovoid-ellipsoid, 1.2–1.5 cm long. Seed 7–9 mm long, broadly ellipsoid to circular. Fig. 41, p. 269.