Plant at fl. mostly c. 3–15 cm. tall, occ. to 25 cm or more. Stem erect, fleshy. Lf overtopping raceme if undamaged but very commonly cropped short. Raceme rarely > 3 cm. long; fls 1–10, often widely spaced, especially on taller plants. Per. green. Dorsal sepal c. 2.5 mm. long, its margin evenly rounded and lacking recurved tip; lateral shorter, ± acute, deflexed, us. straight. Petals ± under dorsal sepal. Labellum oblong, only rarely narrowed at mid-length; tip us. squarely truncate, sts slightly emarginate, not apiculate; margin papillose, shallowly crenate, sts thickened but rarely undulate; anterior callus variously developed, verrucose; large basal calli squarish, flat rather than convex, us. continuous at the sides with narrow band of callus behind slit-like transverse furrow; labellum rather sharply deflexed to hang ± parallel to ovary. Base of column often broader than stigma.
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