Plants leafy, autotrophic, 20-50 cm tall. Stem slender to somewhat robust, with 3-5 loosely clasping basal sheaths, 4-7-leaved. Leaves elliptic, lanceolate, or oblong-lanceolate, 4-16 × 0.5-3 cm, apex acuminate to long acuminate. Inflorescence subdensely 2-20-flowered; rachis 1.5-6 cm; floral bracts linear-lanceolate to narrowly triangular, basal 1 or 2 usually foliaceous and to ca. 70 mm, distal ones 2-6 mm. Flowers weakly spreading, white, 1-1.5 cm; pedicel and ovary 6-10 mm. Sepals narrowly rhombic-elliptic or narrowly elliptic-lanceolate, 11-16 × 3.5-4.5 mm, 5-veined, apex acuminate or subacute. Petals subobovate, 7-8 × ca. 4 mm, 5-7-veined, apex acute or mucronate; lip 5-7 × 6-9 mm, 2-partite; hypochile saccate, enclosed within bases of lateral sepals, with a small orange patch in middle of disk; hypochile lobes erect and embracing column, subovate-triangular, 3-4 mm, apex subacute; epichile triangular-cordate, 3-4 × 5-6 mm, with 3-5 orange lamellae, densely papillose toward apex, apex obtuse to acute. Column 4-6 mm, with 2 small oblong wings; anther 2-2.5 mm; stigma stalked. Capsule elliptic, 1.7-2 × 0.6-0.8 cm. Fl. May-Jun, fr. Sep-Oct. 2n = 16, 32, 34, 34 + 2B, 42.
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An orchid. It grows 20-60 cm tall. The stem is slender with 3-5 loosely clasping sheaths. There are 4-7 leaves. These are narrow and 4-16 cm long by 0.5-3 cm wide. There are 2-20 flowers on a flowering stem.
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