Plants 12-40 cm tall. Rhizome ascending, ligneous, with short scales at nodes. Stem erect, blackish, slender, often branched, remotely with several sheaths. Raceme terminal, 3-5 cm, 5-8-flowered; floral bracts ovate-triangular, 2-4 mm; pedicel and ovary purplish brown, 1-2 cm, slender; calyculus ca. 0.8 mm tall, denticulate. Flowers almost opening widely; sepals and petals brownish to nearly whitish, sometimes tinged with purple, concave. Sepals narrowly oblanceolate, 10-16 × 2-3 mm, apex acute; lateral sepals somewhat oblique, falcate-lanceolate, 12-14 × ca. 2.5 mm. Petals oblanceolate-linear, similar to sepals in size; lip whitish, tinged with purple, narrowly oblanceolate to obovate-spatulate, nearly as long as sepals, adaxially ± papillose-hairy, unlobed. Column white, 6-10 mm, slender. Fl. Aug-Oct.
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