Plants appressed to substrate, seemingly leafless. Roots gray-green, fascicled, to 50 cm × 3-5 mm. Stems inconspicuous, obscured by roots. Leaves bractlike, inconspicuous, often absent. Inflorescences: peduncles arcuate-ascending, 6-25 cm; bracts tubular, sheathing, 5-7 mm; racemes 1-10-flowered; floral bracts lanceolate, 4 × 3 mm, scarious. Flowers opening in succession, usually 1-2 at a time, nocturnally fragrant; sepals and petals spreading, white to creamy green or pale yellow-brown; dorsal sepal lanceolate to elliptic-lanceolate, 20-21 × 5-6 mm, apex acute; lateral sepals slightly oblique, lanceolate to narrowly lanceolate, 25-30 × 4-5.5 mm, apex obtuse to acute; petals falcate-recurved, narrowly lanceolate, 22-27 × 4-4.5 mm, apex acute to acuminate; lip white, basally concave, 3-lobed, middle lobe with subquadrangular isthmus, terminating in 2 arching, twisting, caudate lobes 45-70 mm, apiculate, lateral lobes spreading, 18-25 mm wide when spread, apex obtuse to acute; callus with narrow, denticulate keel; spur arcuate, slender, 11-17 cm; column stout, with 2 triangular wings projecting toward lip, 2-3 × 5 mm diam.; pollinia orange; pedicellate ovary slender, 30 × 1.5 mm. Capsules 6-10 × 0.5 cm. Flowering May--Aug, occasionally as early as Feb. Epiphytic in cypress swamps, wet hammocks; 0--20 m; Fla.; West Indies.