Monocarpic acaulescent herb. Unifoliate; blade broadly ovate, 17–40 cm long, 12–30 cm wide, base shallowly cordate, margin crenate-dentate to crenate, apex obtuse, usually withered, surfaces pubescent, hairs most dense and longest on the principal nerves beneath; lateral nerves 14–16 pairs, parallel, spreading; petiolode less than 1 cm long, pubescent. Inflorescences 2–5, arising from the petiolode and base of the midrib, 13–25(–40)-flowered; peduncles of primary inflorescence 6.5–9.5(–13) cm long, pubescent, the hairs somewhat deflexed towards the base; pedicels 10–22 mm long, spreading-pubescent, the hairs eglandular or rarely with a few scattered glandular hairs; bracts linear to oblanceolate, 6–10 mm long, pubescent particularly beneath. Calyx lobes oblong-lanceolate, 3–4(–5.5) mm long, eglandular-pubescent. Corolla purple, the lobes darker, with or without a whitish patch under the throat outside, 33–44 mm long, rather densely eglandular-pubescent outside, glabrous within; tube cylindric, 25–33 mm long, 3.5–6 mm deep, slightly downcurved and somewhat expanded towards the open mouth, where 8.5–10 mm deep; limb bilabiate; upper lip of two rounded lobes, 4–6 mm long and wide; lower lip 7.5–14 mm long, lateral lobes 5–6(–8) mm long, 4.5–5.5 (–8.5) mm wide, median lobe 4.5–6(–9) mm long, 5–7(–8) mm wide, all rounded and held forward. Stamens arising in the upper third of the corolla tube near the mouth; filaments purple, 4–6.5 mm long, slightly thickened above the base, glabrous or with few sessile glands towards the top; anther thecae purple and white, rounded, 1–1.5 mm wide; staminodes arising from below the stamens, to 0.5 mm long. Ovary narrowly cylindric, 11–19 mm long, densely pubescent, with short, spreading, eglandular hairs; style 8–14 mm long, shortly pubescent, barely narrower than the ovary; stigma white, shallowly bilobed, 1.7–2 mm wide, shortly papillose. Capsule 55–70 mm long, 1.5–2 mm diameter, pubescent. Seeds ± 0.5 mm long, reticulate.
