Plants leafy, autotrophic, 20-50 cm tall. Stem slender to somewhat robust, 4-7-leaved. Basal sheaths 3-5, 1-5 cm. Leaves elliptic, elliptic-lanceolate, or ovate-lanceolate, 5-11 × 1.5-3.5 cm, apex acuminate to obtuse. Inflorescence subdensely 5-10-flowered; rachis 3-8 cm; floral bracts usually very small, 1-3 mm and all shorter than ovary, though occasionally lower one to 12 mm and exceeding ovary. Flowers suberect, weakly spreading, yellow; pedicel and ovary straight to slightly curved, 7-15 mm. Sepals rhombic-elliptic, 12-15 × 3.5-4.5 mm, 5-veined, apex obtuse to acute. Petals similar to sepals but shorter, 8-12 × 2.5-4.5 mm, apex obtuse to acute; lip suberect, 8-9 mm, spurred at base, 2-partite; hypochile lobes erect and loosely embracing column, triangular to ovate-lanceolate, 1.5-3.5 mm, apex subacute; epichile transversely elliptic, ca. 5 × 8-9 mm, densely papillose toward apex, with 5-7 brownish orange lamellae; central 3 lamellae 0.5-1 mm tall, outer lamellae shorter; spur protruding between bases of lateral sepals, conic, sometimes slightly incurved, ca. 3 mm, apex obtuse. Column 6-7 mm, apex dilated, with 2 ovate wings; anther elliptic, ca. 2 mm. Capsule narrowly elliptic, 2-2.5 × 0.5-0.6 cm. Fl. Apr-May, fr. Aug-Sep. 2n = 34.
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