Perennial twining herb, green or brown stems. Basal leaves to 50mm x 30mm, sometimes with yellowish-green spots on upper surface, cauline leaves to 100mm x 9mm, axillary solitary flowers with 1 or 2 pairs of bracts to 4mm, calyx to 18mm with tube to 9mm & lobes to 9mm. Pale purplish-white corolla with tube to 35mm & lobes to 5mm x 4mm. Capsule to 27mm x 4mm included in corolla.