Publ. Field Mus. Nat. Hist., Bot. Ser. 22: 3. 1940. TYPE: Costa Rica. Alajuela: Villa Quesada, San Carlos, altitude 800 m, Valeria 17 26 (F-933729, holotype).
Epiphyte; stem scandent; internodes elongate, 2-15 cm long, 2-3 mm thick, covered with corky, lenticellike tubercles; cataphylls absent.
LEAVES spreading; petioles 2-5.5 cm long, sheathed half their length or less, the base encircling the stem, narrowly flattened with a medial ridge adaxially, faintly multi-ridged abaxially; geniculum less than 5 mm long, weakly luberculate; blades ovalc-cordate, bullate, chartaceous, acuminate at apex, lobed at base, 7-14 cm long, 4-9.5 cm wide, broadest 1-2 cm above point of petiole attachment; the anterior lobe 6-11 cm long; the posterior lobes rounded, 1-2 cm long; the upper surface matte; basal veins 4-5 pairs, sunken above; the lower surface paler; collective vein arising from the first basal vein.
INFLORESCENCE spreading; peduncle obscured by base of spathe or rarely to 5 cm long; spathe green, lanceolate, ca. 5 cm long, ca. 1 cm wide; spadix purplish, 4.2-6 cm long, 5-7 mm diam. at base, 3-4 mm diam. at apex: the flowers rhombic to 4-lobed, 5.3 mm long, 3.5 mm wide; 3-5 flowers visible in the principal spiral, 4-5 flowers visible in the alternate spiral; tepals semiglossy; pistil weakly raised; stigma puncliform, ca. 0.6 mm diam.
INFRUCTESCENCE spreading-pendent; berries orange, obovoid-oblong-ellipsoid, (5)8-9 mm long, 4-6 mm wide, drying dark maroon; seeds (1)2-6, obovate-elliptic, flattened, brown or black, 7 mm long, 3.5 mm wide. Fig. 51.
This species is known from the Atlantic and Pacific lowlands of Costa Rica in tropical wet forest from sea level to 800 m elevation.