Hemiepiphytic; stem appressed-climbing, leaf scars conspicuous, 1--2.7 cm long, 1.5--3.5 cm wide; internodes short on adults, stout, matte to glaucous, 2.5--3 cm diam., frequently longer than broad on nonflowering plants, gray-green, becoming whitish to grayish with age, epidermis flaking; cataphylls thin, spongy, to 20--33 cm long, weakly to sharply 2-ribbed, sometimes unribbed, light green, dark green-striate, persisting in parchment-like mats, eventually fibrous, rarely deciduous intact, margins clear; LEAVES: petioles 52-93 cm long, 9--25 mm diam., subterete to obtusely flattened abaxially, soft, drying black, surface pale, dull whitish-streaked, thinly dark green-striate, drying black; blades ovate, subcoriaceous, semiglossy, slightly bicolorous, very short acuminate to more or less acute at apex, weakly cordate to sagittate at base, 36--87 cm long, 28--66 cm wide (1.3--1.6 times longer than wide), (0.7--1.2 times longer than petiole), about equal in length to petiole, upper surface dark green, drying dark brown to dark yellow-brown, lower surface moderately paler and glossy, drying yellow-brown and matte to weakly glossy, margins weakly undulate and upturned, hyaline; anterior lobe 31--76 cm long, 39--70 cm wide, (1.65--2.9(4) times longer than posterior lobes); posterior lobes 11--29 cm long, 9-31 cm wide, broadly rounded to broadly obtuse; midrib flat to sunken, slightly paler than surface above, convex, concolorous below; basal veins 7--8 per side, and with the first free to base, numbers 3--7 coalesced 4--12 cm; posterior rib prominently naked to 6 cm along the sinus; primary lateral veins (4)7--8 per side, departing midrib at a 50--60º angle, to the margins, sunken and paler than surface above, convex to round-raised, usually darker than surface, sometimes paler than surface near base below; interprimary veins sunken and concolorous above, raised and concolorous below; tertiary veins visible, slightly darker than surface below; minor veins darker than surface, drying smooth below, arising from both the midrib and primary lateral veins. INFLORESCENCES 2--5 per axil; peduncles 5--9.5(14) cm long, 6--10 mm diam., subterete, pale green, white-streaked; spathe 16--18 cm long ((1)1.8--3.5 times longer than peduncle), moderately constricted above the tube; spathe blade white outside, reddish inside; spathe tube red-purple to dark reddish (B & K red-purple 3/7.5) outside, red-purple to dark reddish inside, sap Mango-scented; spadix 13--15(18) cm long; pistillate portion 6 cm long in front, 5 cm long in back, 2.5 cm diam. at middle, 2.2 cm wide at base; staminate portion 11 cm long; fertile staminate portion ca. 1 cm diam.; sterile staminate portion 2.5--3 cm diam.; pistils 4 mm long,1.7--2.3 mm diam.; ovary (4)5-locular, with axile placentation; ovules ca. 20 per locule, 2-seriate, 0.3--0.4 mm long, slightly longer than funicle; funicle 0.2--0.4 mm long, adnate to lower part of partition, style similar to style type B; central style dome fairly well developed; style apex broadly domed; stigma inserted on entire style apex; the androeceium truncate, more or less prismatic, oblong, margins irregularly 4--5-sided, 1--2.5 mm long; thecae oblong, 0.3 mm wide, contiguous, more or less parallel to one another; sterile staminate flowers clavate, irregularly 3--5-sided, 2.3--3.7 mm wide.
Known from Costa Rica, Colombia, and Ecuador and it expected to be found on the Caribbean slope of Panama. In Costa Rica, it occurs at 240 to 1300 m elevation, principally on the Atlantic slope but also on the Pacific slope on the Fila Costeña in Tropical wet forest and especially in Premontane rain forest life zones. In Ecuador, this species is known from Tropical wet forest life zones at 20 to 1750 m in Pichincha Province.