Plants 7–35 cm. Leaves few–several, ascending to arcuate-spreading, scattered along stem or clustered at base, sometimes in basal rosette, gradually reduced to bracts distally; blade elliptic-oblong to ovate-oblong or linear-lanceolate, 3–14 × 0.4–4 cm. Spikes lax to very dense. Flowers resupinate, not showy but sometimes conspicuous, yellowish or perhaps whitish green; lateral sepals spreading to slightly reflexed; petals ovate-falcate, margins entire; lip descending, usually ovate with abruptly dilated base or occasionally lanceolate with less prominent dilation, without basal thickening, 4–5.5(–6) × (1.5–)2–2.5 mm; spur clavate, somewhat tapering toward obtuse apex, 4–6 mm; rostellum lobes divergent, directed downward, very small, obscure, rounded; pollinaria straight; pollinia often protruding from anther sacs, commonly fragmenting and pollen masses trailing onto stigma; viscidia linear to linear-oblong; ovary rather slender to stout, mostly 6–10 mm. 2n = 84.
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