Wahlenbergia hederacea, known as ivy-leaved bellflower, is a delicate, creeping, patch-forming, hairless perennial herb; with stems to 20 cm, weak thread-like; leaves all long-stalked, rounded, palmately-lobed, rather ivy-shaped, pale green, 5–12 mm long and wide, bases cordate; flowers on fine stalks, 1–4 cm long, in leaf-axils, erect or inclined; calyx-teeth narrow, 2–3 mm long, longer than ovary; corolla bell-shaped with 5 short lobes, pale sky- blue, 6–10 mm long x 5–8 mm wide.