A slender perennial, trailing or twining
Annual; stems numerous, prostrate or twining to 2.5 m., pilose.
Corolla pale mauve, white with purple centre, pink with greenish stripes, or pure white, funnel-shaped, 1.3–2.2 cm. long, pubescent.
Sepals accrescent; outer ciliate, ovate with cordate base or with broad, ovate or triangular, cordate or subhastate, 2–5 mm. long, 2–6 mm. wide base and a narrow lanceolate 2–10 mm. long, 1.5–8 mm. wide acute apex; inner sepals lanceolate, broadened at the base, 6.5 mm. long, 2 mm. wide.
Inflorescence 1–3-flowered; peduncle up to 4.5 cm. long, hairy; pedicels up to 1.6 cm. long; bracts minute.
Leaves petiolate; blade ovate to oblong-ovate, rarely rhomboid, 2–10 cm. long, 2.5–6(–7) cm. wide, obtuse to bluntly acute at the apex, broadly cordate sometimes subhastate at the base, pubescent to glabrous; petiole pilose, up to 5.3 cm. long.
Seeds velvety pubescent, 2.7 mm. long.
Capsule globose, glabrous, 6–10 mm. in diameter, tipped with indurated style base.
Capsule globose, glabrous, apiculate by the persistent style-base.
Seeds velvety pubescent with grey or fawn hairs up to 5 mm. long.
Corolla funnel-shaped, pale mauve, white with purple centre, pink with greenish stripes or pure white, 1·2–2·2 cm.; midpetaline areas strigose (at least outside towards the apices).
Inflorescence cymosely 1–3–flowered; peduncle slender, up to 6–5 cm. long, hairy; pedicels up to 1·9 cm. long, pilose, at first erect, reflexed in fruit; bracts minute, lanceolate.
Sepals accrescent, 5–23 × 3–9 mm., glabrous to pilose, generally ciliate, unequal: outer ones ovate with cordate base or with broad, ovate or triangular, cordate or subhastate base 2–5 × 2–6 mm. and a narrow lanceolate 2–10 × 1·5–10 mm. acute apex; inner ones lanceolate, broadened at the base, 6·5 × 2 mm.
Stems numerous from the apex of a taproot, prostrate or twining, or young shoots occasionally suberect, up to 2·5 m., more or less densely covered with white spreading hairs at least when young.
Leaf lamina ovate to oblong ovate, rarely, rhombic, 2–10 × 2·5–7·5 cm., obtuse to bluntly acute at the apex, broadly cordate or sometimes subhastate at the base, pubescent to glabrous; petiole slender, 1–10 cm. long, pilose.