Ligneous-stemmed, high-climbing epiphytic vine to at least 4 m on buttresses or trunks of trees, or on rocks or barks; branches pendent. Internodes 0.3-13.8 cm long, 0.3-4.7 cm wide, brownish green to gray-brown, glossy, drying yellowish to light brown or mid-brown, finely to coarsely sulcate; roots rare and few at distal nodes, to ca. 1 mm in diameter. LEAVES: Petiole (4.1-) 4.7-13.6 cm long, P/L= (0.26-) 0.28-0.47 (-0.54), extensively sheathed, the sheath involute, adnate or with the free portion prolonged to ca. 2.5 mm; unsheathed portion of petiole 0.0-1.1 cm long. Lamina (13.4-) 15.5-32.3 (-40.5+) cm long, (4.4-) 5.0-15.4 (-18.2) cm wide, L/W=(1.94-) 2.10-3.88 (-4.06), IQI= (0-) 3-8 (-9), thinly coriaceous to papyraceous, matte or glaucescent to glossy above, matte to glossy below, moderately bicolored, narrowly to broadly lanceolate, elliptic or oblanceolate (broadest in the middle third) , acute to (more commonly) gradually to ± abruptly short- to long- acuminate apically [the acumen ca. (0.3-) 0.6-1.4 (-2.4) cm long], cuneate to truncate or rounded (and sometimes slightly cordulate) basally; midrib sulcate above, convex below and sometimes becoming paler; primary lateral veins (10-) 13-17 (-19) per side, 0.1-3,3 (-4.1) cm apart, sunken above, convex below, often with conspicuous interprimaries; minor veins distinct below; abaxial laminar surface drying with the tertiary and reticulate veins prominulous and enclosing granular areolae; white stitching rare and obscure to ± abundant; resin canals obscure to evident between tertiary veins; adaxial surface similar, but the reticulate veins usually less prominulous; white stitching not evident to abundant and conspicuous; resin canals not evident. INFLORESCENCES solitary; cataphylls sometimes present, to at least 6.0 cm long and 0.4 cm wide, lanceolate; peduncle (0.3-) 1.2-1.9 cm long, P/S=0.15-0.22; spathe at anthesis 8.5-10.8 (-13.0?) cm long, (0.6-) 0.9-2.4 (-3.0?) cm wide, externally pale to deep green, pale puncture, greenish white along the margins, internally creamy white; spathe drying uniformly and very densely granular externally, sometimes with abundant white stitching, internally virtually smooth to uniformly and densely granular, often with prominent reticulate venation, with longitudinal secretory striations in basal 4/5; acumen of spathe 0.60-0.75 cm long. Stipe of spadix 0.15-0.85 cm long; spadix 8.2-9.1 cm long, the fertile male portion 0.7-0.8 cm wide; sterile male zone ca. 0.5 cm long; fertile female portion of spadix 2.0-2.1 (-3.4) cm long (to 4.8+ cm in fruit), F/S=0.22-0.25 (-0.39), 0.7-1.1 cm wide (to 2.9+ cm in fruit); fertile male flowers 0.7-1.4 mm long, 0.6-1.5 mm wide, irregularly polygonal, columnar to ± laterally compressed; sterile male flowers ca. 1.6 mm long, 1.3-1.7 mm wide; female flowers 1.3-1.7 mm long, 0.6-1.2 mm wide, the stylar canals 2-3. INFRUCTESCENCES: Ripe fruits orange (van der Werff & González 4715). Seeds 0.8-0.9 mm long, 0.25-0.30 mm wide, ± straight to slightly curved, finely striate with the striae minutely and obscurely cancellate, drying mid-brown and glossy.