Plants leafless, holomycotrophic, 10-27 cm tall. Rhizome with many long, fleshy roots. Peduncle 7-15 cm, slender to robust, pubescent, with 2-4 sheaths; sheaths tubular, 1-3 cm, membranous; rachis 4-15 cm, pubescent, laxly to subdensely 12-25-flowered; floral bracts narrowly ovate-oblong, lowest ones 5-8 mm, to ca. 4 mm above, membranous, abaxially hairy, apex acute. Flowers resupinate, pale green to greenish white; pedicel 3.5-5.5 mm, slender, sparsely pubescent; ovary fusiform, 2-3 mm, pubescent; sepals and petals spreading. Sepals ligulate-oblong, 5-6 × ca. 1.5 mm, outer surfaces sparsely pubescent, with prominent midvein, apex obtuse; lateral sepals falcate. Petals linear, 3.5-4.5 × ca. 0.5 mm, glabrous, with prominent midvein; lip spreading forward to suberect, cuneate, 10-12 × 1.5-2 mm, base extremely narrow, apex deeply 2-lobed; lobes diverging at an acute angle to one another, narrowly lanceolate or lanceolate, 3.5-5 × ca. 1 mm, margins minutely ciliate, apices acute. Column arcuate, ca. 3 mm; anther inclined toward rostellum, ca. 0.7 mm; stigma concave, suborbicular; rostellum spreading horizontally or slightly downcurved, ovate-oblong or broadly oblong, large, ca. 0.7 mm. Capsule elliptic, 8-9 × 5-6 mm. Fl. Jul-Aug. 2n = 40.
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