Herbs perennial, 15-50 cm tall. Stems several and cespitose or single, erect, stout, hispid. Basal and lower stem leaves long petiolate, cordate to ovate-orbicular, 5-12 × 3.5-8 cm, base entire to repand, apex acute, cordate to rounded, slightly appressed hispid, hairs discoid at base; upper stem leaves short petiolate, cordate to oblong-ovate, 6-9 × 3-6 cm; lateral veins 3 or 4 pairs. Inflorescences 3-6, becoming terminally clustered, ebracteate. Pedicel 2-2.5 mm, elongated after anthesis. Calyx 5-6 mm; lobes lanceolate to lanceolate-oblong, 1.5-2 mm wide, enlarged after anthesis, hirsute. Corolla black-purple, tubular, 5-6 mm, base ca. 3 mm wide; throat appendages trapeziform, 1.5-2 × ca. 1 mm; limb 8-10 mm wide; lobes subovate, obtuse-mucronate at apex. Anthers oblong, ca. as long as appendages. Style terete, 2-2.5 mm. Nutlets depressed, to 1.5 cm in diam., abaxially convex; glochids dense, yellow, ca. 2 mm. Fl. May-Jul.
Home