Herbs, terrestrial. Stem cylindric, 15-25 cm, 2.5-3 cm in diam., stout, thick, fleshy, with many nodes, ± enclosed by sheaths. Leaves several; petiole sheathlike, amplexicaul, not articulate; blade 15-25 × 6-12 cm, base contracted into petiole, apex acuminate. Inflorescence 20-30 cm, stout, distinctly ridged; rachis 5-15-flowered; floral bracts green, ovate, 4-5 × ca. 2.3 mm. Flowers greenish yellow; pedicel and ovary ca. 1.4 cm. Sepals linear-oblong or narrowly elliptic, 13-16 × 3-4 mm, margin revolute, apex acute; lateral sepals slightly oblique. Petals filiform, ca. 1.4 cm; lip reflexed near middle, obovate, ca. 1.4 × 1.1 cm, base contracted, apical margin denticulate; disk with 2 carinae. Column arcuate, ca. 8 mm. Capsule pale green, ca. 2.7 cm × 9 mm; fruiting pedicel ca. 1.1 cm. Fl. Apr-May.
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