Ophiorrhiza nutans C.B.Clarke

Herbs, weak to erect, to 70 cm tall; stems densely reddish brown villous with multicellular trichomes. Leaves in subequal to unequal pairs; petiole 0.5-2 cm, densely pubescent; blade drying papery, ovate, lanceolate, elliptic, or elliptic-oblong, 3-8(-13) × 1.5-4 cm, sparsely pilose or strigose adaxially, glabrescent except pubescent along principal veins abaxially, base obtuse to subrounded then attenuate, margins ciliolate, entire or undulate, apex acute to cuspidate; secondary veins 9-13[-15] pairs; stipules persistent, lanceolate or subovate, 8-10 mm, acuminate to 2-lobed. Inflorescence congested-cymose to corymbiform, many flowered, densely hirtellous; peduncle 1-3[-6] cm; bracts linear-oblong or lanceolate, 5-10 mm, ciliate, sometimes fimbriate and/or with a linear lobe at each side. Flowers distylous, subsessile. Calyx densely hispidulous to glabrescent; hypanthium subturbinate, ca. 1.5 mm; lobes sublanceolate, ca. 1.2 mm. Corolla white, tubular-funnelform, glabrous or sparsely hispid outside; tube [6.5-]9[-19] mm, inside sparsely pilosulous near middle and barbate in throat; lobes subtriangular or subovate, 2-3 mm, dorsally narrowly winged. Capsules mitriform, ca. 2.5 × 6-7 mm, hispidulous to subglabrous.

It is a temperate plant. In Tibet it grows in moist forests between 700-2,400 m above sea level.