Herbs, weak at base, ascending above, to 20[-60] cm tall; stems pilosulous [to glabrous]. Leaves in unequal [to subequal] pairs; petiole [0.5-]1-3 cm or longer, glabrous; blade drying thickly papery [or leathery], adaxially grayish green, abaxially greenish yellow, ovate, sublanceolate, or elliptic-oblong, 3-14[-15] × 2-4.5[-6] cm, subglabrous on both surfaces, base obtuse and often shortly decurrent, distinctly inequilateral [or symmetrical], margins entire or undulate, apex acuminate or cuspidate; secondary veins 7 or 8(or 9) pairs; stipules caducous, reduced, subulate. Inflorescences corymbose to congested-cymose, several to many flowered, puberulent to subglabrous; peduncle 1-1.5 cm; axes short or 0.5-1 cm, helicoid; bracts linear, 2-3 mm, caducous. Flowers with biology unknown, on pedicels 1-2 mm. Calyx densely puberulent; hypanthium broadly compressed turbinate, ca. 1 mm, 5-ribbed; lobes triangular, ca. 0.4[-1.5] mm, each sinus with 1 gland. Corolla pale red, drying yellow, salverform, glabrous outside; tube 23-25[-27] mm, glabrous inside; lobes ovate-triangular, [2-]5 mm, dorsally narrowly winged, apex rostrate. Capsules mitriform, 5-6 × 14-15 mm, puberulent. Fl. Apr-Jun.
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