Plant at fl. c. 5–10–(15) cm. tall, elongating later. Stem erect, very slender. Green cauline lf sessile, us. above middle of stem, c. 1 cm. long, orbicular to oblong, apiculate, when well developed similar to lamina of petiolate lf. Petiolate lf from horizontal rhizome near to or remote from base of flowering stem; lamina c. 1 cm. long, orbicular to broadly ovate, obtuse to apiculate, rounded or subcordate at base, margin ± shallowly crenate. Raceme 1–2 cm. long; floral bracts small and membr. Fls 1–4; per. c. 5 mm. long, horizontal to deflexed, greenish. Sepals with thick rounded keels and ± involute margins; dorsal broad, subacute; lateral slightly longer, minutely cucullate. Petals very much shorter, oblong, erect. Labellum shorter than sepals, broad-ovate, partly embracing column; tip ± obtuse, recurved; proximal part concave, marked by median triangular thickening and 2 low longitudinal ridges or basal calli. Column shorter than labellum; wings broad throughout, sharply truncate or almost toothed above. Anther partly behind very prominent stigma; pollinia mealy, the grains remaining in tetrads or larger groups.