Ipomoea bathycolpos Hallier F.

Perennial herb with woody taproot, producing annual prostrate stems; scabrid in all parts except corolla. Stems terete or angular, up to ±2 m long. Leaves subcoriaceous, secund, somewhat peltate, cordate to triangular-cordate, 15-55 x 7.5-40.0 mm, apex acute to rounded, usually mucronate with deep basal sinus and oblong basal lobes, upper surface subglabrous, rough, finely net-veined, lower surface similar but with somewhat raised veins; margin thickened, subentire to rarely with large irregular teeth; petiole shorter than or ± as long as leaves. Peduncles 1-or 2-flowered, ± as long as leaves; bracteoles minute; pedicels 5-20 mm long, much thickened in fruit. Sepals unequal, chartaceous; outer acute to obtuse, ±12 mm long; inner acute, up to 20 mm long, dark green to brown or purplish green. Corolla funnel-shaped with spreading limb, pale mauve to almost white with mauve-magenta centre, 35-70 mm long and limb as wide; midpetaline areas glabrous, conspicuous. Capsule globose or depressed-globose, glabrous, ±15 mm in diameter. Seeds ±10 mm long, tomentose.