Plant 2–2 1/2 ft. high, with a robust stem 4–5 lin. thick, clothed with short sheath-like leaves, with ovate, acute or acuminate tips, about as long as the internodes, and closely embracing the stem. Spike moderately dense, 4–6 in. long, 2–3 in. diam. Flowers large, light blue. Bracts 3/4–1 1/4 in. long, 4 1/2–6 lin. broad, lanceolate, acuminate or acute. Dorsal sepal 4 1/2–5 lin. in diam. at the mouth, extinguisher-shaped, gradually tapering from the mouth to a long, very ascending, acute, straight spur, rather slender in the apical part, and measuring from mouth to tip 1 1/4–1 3/4 in. Lateral sepals deflexed, 6–7 lin. long, 3 1/2–4 lin. broad, oblong, obtuse, concave. Petals 4 1/2–5 lin. long, 1 1/2–2 lin. broad in upper part, entire, falcate, lanceolate, or linear-oblong, acute, auriculate at base in front. Lip 3 1/2–4 lin. long, gradually tapering from the 1 lin. broad base to the acute apex. Anther horizontal, 1 1/4 lin. long.
