Monocarpic. Leaf solitary, oblong, up to c. 20 × 10 cm., base cuneate to subcordate, margin finely dentate-serrate, both surfaces appressed-pubescent. Inflorescences several from base of midrib, many-flowered. Peduncles up to c. 25 cm. long; pedicels 5–20 mm. long, both pubescent. Bracts minute. Calyx divided to the base into 5 lanceolate segments c. 2.5 × 1 mm., pubescent. Corolla c. 11–13 mm. long, pure white or very rarely violet-blue, pubescent outside, glabrous inside except for minute unicellular hairs on roof and floor of tube and inside of lobes; tube 7–9 mm. long, 3–4 mm. diam., subcylindrical, directed downwards then forwards, somewhat ventricose below mouth, base slightly oblique and slightly saccate above; limb straight, lobes of both lips directed forwards, all lobes oblong, subequal, c. 2 mm. long. Stamens arising in lower third of corolla tube, filaments c. 3 mm. long, slightly thickened and glandular above; anther lobes c. 1 mm. long; staminodes minute. Ovary c. 4 mm. long, appressed-pubescent; style c. 4.5 mm. long, glabrous above, slightly dorsoventrally compressed; stigma elliptic, stomatomorphic, papillose. Capsule about 35 mm. long, 1.5 mm. broad, crowned with the persistent style base. Seeds 0.7–0.9 mm. long, reticulate.
