Herbs, weak; stems elongated, drying brownish red, glabrous or puberulent. Leaves in markedly unequal pairs; petiole 0.5-3 cm, puberulent; blade drying thinly papery, straw-yellow except usually purple on midrib, lanceolate-oblong to elliptic, larger ones 3.5-9.5 × 1.3-2.7 cm, smaller ones 1.5-6.5 × 0.7-1.8 cm, subglabrous on both surfaces or sparsely strigose or pilose adaxially and puberulent along principal veins abaxially, base cuneate, margins subentire, apex caudate-acuminate; secondary veins 8 or 9 pairs; stipules caducous, not seen. Inflorescence congested-cymose, few flowered, puberulent to pilosulous; peduncle 1-1.5 cm; axes reduced or 2 or 3, helicoid, ca. 1 cm; bracteoles linear, 3.5-4 mm, obtuse. Flowers distylous, subsessile. Calyx puberulent or pilosulous to glabrescent; hypanthium turbinate, ca. 1.2 mm, 5-ribbed; lobes subovate or sublanceolate, ca. 0.5 mm. Corolla white, tubular-funnelform, subglabrous outside, inside with white villous ring near middle and sometimes scaly villosulous in upper part and onto lobes; tube ca. 9 mm; lobes elliptic-oblong, ca. 3 mm, dorsally with wing ca. 0.5 mm wide, apex subrostrate. Capsules not seen. Fl. Apr.
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