腺木叶蛇根草 xian mu ye she gen cao

Herbs or subshrubs, erect, to 2.5 m tall; stems puberulent to villosulous. Leaves in generally equal pairs; petiole 2-4 cm, densely villosulous; blade drying thinly papery, olive-green, elliptic-ovate or elliptic, 10-20 × 4-7.5 cm, sometimes weakly bullate, adaxially glabrous or sparsely strigillose to puberulent, abaxially glabrous to densely villosulous, base obtuse to rounded then shortly decurrent, margins entire, apex acute to shortly cuspidate; secondary veins 15 or 16 pairs; stipules caducous, unknown. Inflorescence congested-cymose, many flowered, 5-6 cm wide, densely villosulous-tomentulose; peduncle ca. 2.5 cm; axes several, dichasial at lower axes then helicoid above; bracts linear-lanceolate, 5-10 mm, acuminate. Flowers with biology unknown, subsessile or on pedicels to 2 mm. Calyx densely hirtellous; hypanthium subglobose, ca. 1.5 mm, 5-ribbed with ribs glabrescent; lobes triangular, 0.8-1 mm. Corolla white, tubular, outside glabrous to pilosulous, pubescent throughout inside; tubes 10-11 mm; lobes subtriangular, ca. 2 mm, reflexed, dorsally with horn 1.5-2 mm near apex. Capsules not seen. Fl. Dec.

● Sparse forests in valleys; ca. 600 m. Guangxi (Longzhou).