Plants 16–60 cm. Leaves few, ascending-sheathing, little more than bracts, scarcely reduced distally; bracts often lacking; blade ovate to elliptic-ovate, 2.5–6 × 0.7–2 cm. Spikes lax to rather dense. Flowers resupinate, not showy, green to yellowish green; lateral sepals reflexed or sometimes spreading; petals ovate-to lance-falcate, margins entire; lip descending or reflexed, linear to linear-oblong or linear-lanceolate, 6–10(–14) mm, margins entire, often with series of low parallel ridges on adaxial surface; spur cylindric or tapering toward apex, 9–20 mm, apex usually rather acute; rostellum lobes somewhat divergent, directed forward, rounded-subangular, rather prominent; pollinaria straight; pollinia remaining enclosed in anther sacs; viscidia orbiculate to broadly elliptic-oblong; ovary rather slender to stout, mostly 6–12 mm.
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