Terrestrial large herbs, subshrubs or slender shrubs; stems erect or ascending, 0.5-1.0( m tall, reddish to purple, densely pilose above, sparse below. Leaves strongly unequal; larger leaf in a pair oblong, elliptic, oblanceolate or ob-ovate, 7-17 cm long, 3-8 cm wide, membranous, the apex acute to acuminate, the base oblique, subcordate to acute, the margin serrate, above usually more or less bullate, dark green, sparsely pilose to subscabrous, below green or purplish, sparsely to densely pilose especially along the veins; petioles 0.5-4.0 cm long, purplish, sparsely to densely pilose. Inflorescences of several flowers in terminal panicles, to 20 cm long; primary peduncles 5-9 cm long, reddish, pilose; bracts linear lanceolate, to 8 mm long, 1-2 mm wide, reddish, pilose; ultimate pedicels ca. 5 mm long at anthesis, elongating in fruit, reddish, pilose. Flowers with the floral tube slightly oblique to the pedicel, shortly cylindric. 2-3 cm long and wide, reddish, densely pilose with uncinate trichomes; calyx lobes linear to lanceolate, 5-15 mm long, 1-2 mm wide, elongating somewhat in fruit, erect, subsulcate, outside reddish, pilose with both uncinate trichomes and longer, larger, straight trichomes, inside lighter colored, nearly glabrous; corolla mostly white, the throat often yellow, the upper part or the base of the
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tube purple or red spotted, or the limb pale purple, the tube oblique in the calyx, campanulate, 1.7-2.0 cm long, 3-4 mm wide at the base, ampliate to 1.0-1.5 cm broad at the throat, the outside pilose, the inside nearly glabrous, the limb lobes broadly rotund, erect to patent, 5-8 mm long, ca. 1 cm wide, entire; stamens included, the filaments curved, coiling after pollen is shed, adnate to the base of the corolla tube for 1 mm, ca. 8 mm long, glabrous, the anthers broadly sagittate, 2 mm long, all coherent at the apices, occasionally a short staminode present; disc lacking or much reduced; ovary apex conic, pilose, the style curved, 6-9 mm long, glabrous, the stigma stomatomorphic. Capsule cylindric, slightly curved, more or less gibbous on 1 side, 1.2-1.8 cm long, 3-4 mm in diam., brown to purple, pilose, dehiscent along 1 line on the side of the gibbosity; seeds irregular, broadly fusiform, ca. 0.5 mm long, the surface rugose, striate, dark reddish brown, attached to a thin white funiculus.
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