Plants normally epiphytic, very large and coarse, the caudex thick and short; petioles usually very short and thick, 3-carinate dorsally, 15-30 cm. long or often shorter, 2-3 cm. in diameter, the node 1.5-2 cm. long, tricarinate dorsally; blades coriaceous when dried, oblong-oblanceolate to obovate, usually 60-100 cm. long and 25-30 cm. wide but often much wider and longer, cuspidate-acute, cuneately long-attenuate to the narrow base, green above, slightly paler beneath, the costa very thick, 3-to 5-angulate, the primary lateral nerves 9-14 on each side, stout, prominent, spreading or erect-patent, not forming a distinct collective nerve; peduncles shorter than the leaves, as much as 70 cm. long, about 1 cm. thick, angulate below, terete above; spathe subcoriaceous, dark red within, linear-lanceolate, long-acuminate, 12.5 cm. long or even longer, 2.5 cm. wide at the base; spadix short-stipitate, purple when young, later becoming white, caudiform, 15-30 cm. long and 1.5 cm. thick, or in fruit much larger or at least thicker, often 5 cm. or more in diameter, attenuate toward the apex; ovary ovoid, equaling the sepals; berries ovoid, bright red, 1 cm. long, 5 mm. thick; seeds ovoid, 4 mm. long, the testa yellow, minutely verruculose.
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