plant 4–15 in. high; stem stout, erect; leaves cauline, numerous, somewhat spreading, sessile from a broad sheathing base, linear-lanceolate, attenuate upwards and acuminate, 2–4 in. long, upper somewhat smaller; scapes 4–15 in. high; spikes oblong, 2–7 in. long, very dense, many-flowered; bracts ovate, acute, 3–5 lin. long; pedicels about 2 lin. long; flowers small, globose, clear sulphur-yellow; dorsal sepal elliptic-oblong, obtuse, 2 lin. long; lateral sepals connate into an orbicular deflexed limb, emarginate, subconcave, 2 lin. long; petals obliquely ovate, obtuse, conduplicately folded, with a rounded basal auricle, broadly saccate at the base, 2 lin. long; lip broadly unguiculate; limb sharply reflexed, obcordately bilobed, 3/4 lin. long, with broad obtuse lobes; appendage rising from the limb as a tall erect keel, then dilated into a broadly hastate truncate limb, 1 lin. long; column short; arms of the rostellum suborbicular, very short. null
