Herbs erect, rhizomatous, ca. 60 cm tall. Stems obtusely 4-angled, grooved, glabrous or ± hirsute. Leaves gradually reduced upward, lanceolate, 3-15 × 1.5-4.5 cm, strigose along veins, sparsely hirsute adaxially, inconspicuously glandular along veins abaxially, base cuneate-attenuate, margin irregularly callose serrate, apex acuminate. Cymes sparsely strigose, 3-5-flowered; peduncle 1-1.5(-2) cm; bracteoles lanceolate, longer than pedicel. Pedicel to 5 mm. Calyx campanulate, 2-lipped, 8-10 mm in flower, saccate-dilated, to 2 × 1.5 cm in fruit, sparsely strigose, glabrescent outside, with conspicuous transverse veins at apex; teeth 4 or 5, unequal, deltoid, obtuse. Corolla purple, 3-4 cm, obscurely 2-lipped, finely papillate outside, puberulent at base of upper lip inside; tube projected, gradually dilated; upper lip ca. 7 mm, entire; lower lip as long as adaxial, middle lobe largest, margin entire or undulate. Filaments puberulent basally. Nutlets brown, narrowly ellipsoid, ca. 1 cm, winged, finely striate. Fl. Aug, fr. Sep-Oct.
Home