Opithandra obtusidentata W. T. Wang

Petiole 1.3-7.5 cm, with dense, white to brownish shorter appressed hairs and brown longer spreading ones; leaf blade narrowly elliptic to rhombic-elliptic, 4-9.5 X 2-5 cm, papery to herbaceous, nearly flat, appressed puberulent, abaxially brown villous along veins, base cuneate to broadly cuneate, margin single or double crenate to crenate-dentate, apex obtuse to acute; lateral veins 4-6 on each side of midrib. Peduncle 6.5-14 cm, spreading brown pubescent; bracts lanceolate-linear. Calyx 5-sect from base; segments lanceolate, ca. 5 X 1.5 mm, apex acute to obtuse. Corolla red-purple, ca. 3.2 cm, outside sparsely pubescent, inside sparsely glandular below abaxial lip; tube funnelform-tubular, slightly gibbous abaxially, ca. 2.3 X 0.9 cm; adaxial lip ca. 5 mm; abaxial lip ca. 9 mm, all lobes entire. Stamens adnate to corolla tube ca. 7 mm above base, ca. 7.5 mm; filaments sparsely puberulent; anthers coherent at apex, reniform, dehiscing from arcuate slits; staminodes 3, adaxial 1 ca. 1.2 mm, abaxial 2 ca. 2 mm. Pistil included, ca. 2.1 cm, glabrous. Style ca. 6.5 mm; stigmas 2. Fruit unknown. Fl. May.

* Streamsides in valleys. W Hunan (Qianyang Xian).