Perennial with trailing and twining stems, more or less glabrous to moderately hairy. Mid-stem leaves ovate to oblong-lanceolate or narrow-triangular in outline, 2–5 cm long, 15–27 mm wide, apex acute to rounded or emarginate, base cordate or sagittate, the basal lobes (1 or 2 per side) spreading, to c. 1 cm long, more or less glabrous at least above; petiole 25–35 mm long. Flowers 1–3; peduncles 10–60 mm long; pedicels 5–20 mm long, straight or sinuate in fruit, shorter than peduncles; bracteoles linear to subulate, 1–3 mm long; sepals obovate, oblong or elliptic, 4.5–7 mm long, sparsely to moderately hairy; corolla funnel-shaped, 7–15 mm long, pink or mauve with a greenish throat. Capsule globose to globose-ovoid, 5.5–6.5 mm diam., style-base persistent; seeds finely punctate, bearing numerous small irregular tubercles. Flowers late spring to early autumn.