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Inflorescences terminal and paniculate on the young leafy branches, 8–11 cm long and up to 8 cm wide (including the opened flowers); cymes short, many-flowered sometimes 2-flowered, racemosely or subumbellately arranged on slender peduncles, sometimes a few in the upper axils or supra-axillary and these sometimes similar to the terminal inflorescence (but smaller), in some intermediates also borne on leafless lower stems but here the clusters are much shorter than in C. silvanum and more pubescent; peduncles of the inflorescences 3–6 cm long; peduncles of the cymes 1–3 cm long, the lowermost spreading; pedicels up to 5 mm long.
Leaves opposite, subopposite or 3-whorled, petiolate; lamina 2.5–16 × 1.5–10.8 cm, broadly elliptic or suborbicular to oblong-obovate, abruptly and shortly acuminate at the apex, rounded to cuneate at the base, entire to repand-dentate or undulate in the margins, dull green and glabrous above, pale green and sparsely pubescent on the margin and venation beneath, with the reticulation ± raised beneath, sometimes chartaceous; petiole 0.2–5.5 cm long.
Indumentum on young shoots and stems of low shrubs ± densely fulvous-pilose or villose consisting of simple many-celled soft patent hairs to c. 1 mm long, sometimes with some shorter ± crisped hairs intermixed; older stems becoming puberulous with mostly short hairs, becoming lenticellate and often with raised leaf scars or persistent petiole bases.
Calyx (4)5–7 mm long and 2–3 mm in diameter, narrowly cylindrical-funnel-shaped, appressed pubescent or hairy with hairs similar to those of the inflorescence; lobes 1–2 mm long, triangular, acute, pale green, accrescent.
A low sparsely branched erect shrub to c. 1 m high or scandent shrub with arching stems to c. 6 m high; stems scandent by means of persistent hook-like and often retrorse petiole bases.
Corolla white, sweet scented; tube 15–19 mm long, sparsely hairy to the base; lobes 2.5–4.5 × 2.5 mm, subequal, suborbicular to broadly ovate, obtuse.
Fruit c. 1.2 × 0.9 cm, oblong-ellipsoid, surrounded by the accrescent cupuliform strongly ribbed fruiting calyx c. 10 mm in diameter.
Anthers and stigma greenish.
Style exserted 8 mm.
