Herbs, ascending; stems drying reddish brown and usually angled, densely reddish brown pilosulous at least when young. Leaves in subequal pairs; petiole 0.5-2.5 cm, densely pilosulous; blade drying thinly papery, oblong-ovate, elliptic, oblong-lanceolate, or ovate, 2-7.5 × 1-3 cm, adaxially sparsely puberulent, abaxially glabrescent to usually densely puberulent on principal veins, base cuneate, margins entire, apex acute to obtuse; secondary veins 5-7 pairs; stipules persistent to deciduous, lanceolate to subovate, ca. 4 mm, entire or sparsely dentate, at base usually with 2 glands, acuminate and sometimes with small globose gland at apex. Inflorescence congested-cymose, several flowered, densely reddish brown pilosulous; peduncles 1-1.5 cm; axes relatively short, helicoid; bracts linear-lanceolate, spatulate, or lanceolate, 5-7 mm, often pinnately veined, subglabrous or ciliate, obtuse to subacute. Flowers with biology unknown, subsessile or on pedicels 1.5-3 mm. Calyx with hypanthium turbinate, ca. 1.5 mm, 5-ribbed, densely pilosulous; lobes lanceolate, subovate, or spatulate, unequal, largest ones 3-6 mm, smallest ones 0.8-3 mm, pinnately veined, ciliate or subglabrous. Corolla dark red, tubular-funnelform, outside 5-winged in upper part in bud and glabrescent; tube 15-17.5 mm, inside with 5 small villous fascicles below throat and just above anthers; lobes subovate to ligulate, 2.5-3 mm, inside densely shortly scaly pubescent, dorsally with broad lunate wing, apex rostrate. Immature capsule obcordate, ca. 2 × 5.5 mm, ferruginous pilosulous. Fl. Jul.
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