Plants 14–80 cm. Leaves 1–4, wide-spreading to ascending, scattered along stem, gradually to abruptly reduced to bracts distally; blade linear-lanceolate, linear-oblong, or oblong-obovate, 7–23 × 0.7–5 cm. Spikes lax to dense. Flowers resupinate, not showy to inconspicuous, whitish green or yellowish green, lip often paler; lateral sepals reflexed; petals linear to narrowly oblong-spatulate, margins entire or apex rarely slightly lacerate; lip descending, without basal thickening, deeply 3-lobed, 10–17 × 13–17 mm, lobes extensively and deeply divided, commonly into filiform divisions, margins rarely merely fringed or middle lobe merely lacerate-fringed, lateral lobes narrowly to broadly cuneate, middle lobe cuneate-flabellate, usually narrow; spur slenderly to markedly clavate, 11–23 mm; rostellum lobes nearly parallel, directed downward, short, rounded; pollinaria nearly straight; pollinia remaining enclosed in anther sacs; viscidia linear; ovary slender to stout, mostly 8–20 mm. 2n = 42.
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