Large vine, the branchlets mostly angular, with rows of lenticels. Leaves subsessile, the petiole 1-2 mm long and ca. 2 mm wide; blade oblong, 2.5-3.5 times as long as wide, 7-12 cm wide, shortly acuminate or acute-subacuminate apically, asymmetric and mostly rounded or obtuse or sometimes acute basally (the first leaf below the inflorescence dimorphic, smaller and relatively wide), coriaceous, the midrib slightly sulcate above, prominent beneath, the lateral veins obscure or obsolete; hypophyllous glands numerous, mostly 2-3 small poriform glands in an oblique row in the basal part of the blade and a row of numerous minute poriform or solid glands within 1 mm from the margin. Inflorescences with ca. 7-12 flowers and mostly one nectary or none; nectaries flask-or pitcher-shaped, ca. 3.5-4.5 cm long, the stalk 0.5-1 cm long, the cup clavate, 2.5-4 cm long, the orifice with a recurved apiculate rim. Flowers erect or slightly oblique on the pedicels, the pedicels 4-6 cm long, lenticellate, especially when fruiting; bracteoles suborbicular to broadly semiorbicular, 1.5-3 mm long and 2-4 mm wide; sepals broadly suborbicular, 4-6 mm long and 6-8(-9) mm wide, the margin without glands; corolla ca. 13 mm long and ca. 7 mm in diameter; stamens ca. 20-30, the filaments linear, flattened, ca. 5 mm long in bud, the anthers linear, ca. 4-5 mm long, sagittate basally; ovary cylindrical-subglobose, abruptly narrowed to the ca. 2 mm long style, including the style ca. 5-8 mm long, ca. 3-4 mm in diameter in bud, 8-9-loculed. Fruit unknown.
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