Description based on dried material only. Epiphytic; stem and cataphylls unknown. Petioles 8 cm long, 7 mm diam., D-shaped, with medial rib and the margins sharply raised adaxially, probably rounded abaxially; geniculum conspicuously thicker and somewhat darker than petiole, 0.7 cm long. Blades subcoriaceous, oblanceolate, narrowly acute at apex, very long-attenuate at base, ca. 100 cm long, 18.5 cm wide, broadest above the middle, the margins moderately undulate; both surfaces matte, grayish green, slightly paler below; midrib more or less acutely raised above, slightly paler than surface, broadly convexly raised and brownish below; primary lateral veins ca. 21 per side, departing midrib at 40–50 degree angle, usually straight, sometimes weakly arcuate to the margin, conspicuously raised above and below, the same color as the midrib; tertiary veins weakly visible, flat to weakly raised above and below; collective vein absent. Inflorescences erect; peduncle 36 cm long, ca. 2 mm diam., 4.5 times as long as petiole, drying the same color as midrib, terete. Spathe spreading-ascending, subcoriaceous, purple, drying brown, lanceolate, 8 cm long, ca. 1.3 cm wide, acuminate at apex (the acumen inrolled, 13 mm long), narrowly acute at base. Spadix drying brownish, oblong-cylindroid, slightly curved, 12 cm long, ca. 4 mm diam. midway; flowers square to rhombic, ca. 4–7 flowers visible in principal spiral; tepals more or less smooth; lateral tepals 4 mm wide, the inner margins broadly convex, the outer margins 2-sided; anthers 0.4–0.5 mm long, 0.6 mm wide; thecae slightly divaricate. Infructescence not seen.

Type: Ecuador. Morona﷓Santiago: Cordillera de Cutucú, along trail from Logrono to Yaupi, Madison et al. 3285 (SEL 014964, holotype).

Morona﷓Santiago: Cordillera de Cutucú, W slopes: Logrono﷓Yaupi, 1300 m, 2°46'S, 78°6'W, Madison et al. 3285 (SEL).

Description based on dried material only.