Perennial herb with 1–3 erect stems from large creeping woody rootstock with fleshy roots; stems to 75 cm long, quadrangular, sparsely to densely pubescent with curly non-glandular hairs, with distinct bands of longer hairs at nodes (rarely glabrous). Leaves dark green, glossy, palmately veined; petiole 2–5 mm long on vegetative leaves, indumentum as on stems; lamina ovate or broadly so (rarely elliptic), largest (3.5–)4.5–9(–19)≈(2.7–)3–6(–10.5) cm, usually less than twice as long as wide, apex acute to obtuse, apiculate, base subcordate to cordate with rounded (rarely hastate) lobes, margin entire to slightly crenate, subglabrous to puberulous, densest on veins (rarely glabrous). Flowers solitary; pedicels 2–7.5 cm long, glabrous to puberulous (rarely pubescent); bracteoles pale green, with conspicuous raised dark green reticulation, more rarely with obscure reticulation, ovate-oblong, 1.5–3(–3.5)≈0.6–1.1 cm, acute to obtuse, with sparse to dense long (to 2 mm) glossy glandular hairs on veins and margins (rarely pubescent without glands or glabrous). Calyx glabrous to minutely puberulous, 1–2(–4 in fruit) mm high of which the broadly triangular lobes about half. Corolla limb and upper part of tube white to blue or mauve, lower part of tube white, throat yellow; tube 2.5–3.5 cm long; lobes 1–1.7≈1.5–2 cm. Filaments 8–10 mm long, glabrous or glandular at base; anthers 2–2.5 mm long. Style with scattered glands. Capsule 7–9 mm in diameter, beak 13–16 mm long. Seed reddish brown, ± 5 mm in diameter, reticulate to spinulose near apex.