Hemiepiphytic vine. Internodes 2-6 cm long, 3-5 mm diam., dark green to olive-green or grayish, turning light brown, semiglossy, weakly flattened on one side, drying light yellow-brown to dark brown. LEAVES: Petioles 6.5-10.5 cm long, medium green and weakly glossy, darker along the margins, sheathed from ?, its length to nearly throughout but ending 6-15 mm below the blade, sometimes to the base of the geniculum, narrow, erect and incurled, the margins touching toward the base, typically less than 5 mm high, to ca. 8 mm wide when flattened (to 1 cm wide when subtending inflorescence), narrowly rounded at the apex, the free portion of the petiole and the geniculum sharply sulcate. Blades thinly coriaceous, slightly to moderately inequilateral, oblong- elliptic to narrowly obovate, 9-21 cm long, 3-7.5 cm wide, gadually to abruptly acuminate at apex, slightly inequilateral and acute at base, subcoriaceous, dark green and weakly subvelvety matte to weakly glossy above, slightly to moderately paler and matte below, drying gray-green above, yellow-green below. Midrib deeply sunken and concolorous above, narrowly convex and slightly paler below. Primary lateral veins 3-5(7), weakly visible and weakly sunken above, flat and weakly pleated-raised below, scarcely more vislble than minor veins (only slightly wider at times), arising at 45-50º angle, drying paler than surface, sometimes weakly undulate, gradually arcuate to margins. Minor veins visible but usually weak and thin. INFLORESCENCE solitary. Peduncle slender, mostly exposed, 2.5-3 cm long, drying less than 3 mm diam., reddish brown. Spathe 6-8 cm long, 1-2 cm diam., not at all constricted above the tube, solid green to yellowish, slightly paler within, drying reddish brown. Spadix 5-7.5 cm long. Pistillate portion 2-3.7 cm long, 8- 10 rnm diam. Staminate portion weakly protruded forward, slender, with a small portion remaining exposed on drying.