Terrestrial or epiphytic herb with shoots up to 15 cm. high arising at intervals of 4–12 cm. from a slender terete creeping rhizome up to 2 mm. in diameter and partly concealed by sheaths 1 cm. long.. Roots slender, flexuous, arising at base of shoot and at intervals along the rhizome.. Pseudobulbs fleshy, up to 4 cm. high, 4 mm. in diameter at base, rarely broader, tapering to 1 mm. diameter at apex, with 2–3 small sheathing leaves at the base and 3 larger foliage leaves arising at intervals up the pseudobulb.. Leaves light green, membranous, ovate to oblong-lanceolate 5–8(–12) cm. long, 1.5–3 cm. wide, acute to acuminate at the apex, gradually tapering to a sheathing base, 5-veined, margins smooth or slightly crinkled.. Inflorescence terminal, longer or shorter than the leaves, with 2–6(–10) flowers; rhachis up to 3 cm. long; peduncle up to 9 cm. long, 1 mm. in diameter, slender and curving; bracts up to 5 mm. long, 2 mm. wide at the base, acuminate, lower ones sometimes sterile.. Ovaries slightly longer than the bracts.. Flowers cream or yellowish green to light and dark reddish purple.. Dorsal sepal up to 10 mm. long and 3 mm. wide at the auricled base, tapering to an obtuse apex; lateral sepals joined almost to the apex although they may pull apart slightly; united part up to 6.5 mm. wide and long, orbicular, slightly auricled at the base, curved up beneath the lip.. Petals linear, up to 11.5 mm. long, 0.8 mm. wide, rounded to acute at the apex.. Lip narrow at the auricled base with a bilobed callus, then abruptly widening to become flabellate, emarginate, apiculate, margins crenulate to dentate, up to 7.5 mm. long and 7 mm. wide.. Column slender, terete, winged at the apex, curved, up to 5 mm. long.. Fig. 64, p. 300.
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