Robust species. Whole plants often blackish, 800–1,600 mm tall. Free part of leaf to 200 × 10–15 mm, green to brown or often blackish. Spike 190–400 mm long, 15–100-flowered. Ovary sessile, long, green to brown or often blackish, appressed to stem. Flowers crowded, scented, 10–15 × 7–10 mm, yellow, yellowish green, brownish or purplish (sometimes wholly dark purple), labellum lamina white, mauve or pink, callus green to yellowish green. Dorsal sepal 8–11 × 3–5 mm, decurved to incurved. Lateral sepals fused, each sepal 8–11 × 3–4 mm, erect behind labellum. Petals 7–9 × 2.5 mm, spreading. Labellum shortly stalked, recurved gently near middle, 8–9 × 6 mm, margins intensely wavy/crinkled. Callus broad, narrowing distally, extending nearly to labellum apex, margins ridged or raised.
A very widespread and common orchid that grows in a wide range of habitats from the coast to inland areas including open forest, woodland, heathy woodland, mallee shrubland, mallee heath, buttongrass moorland, swamp margins, sedgeland, coastal heath, grassy headlands and rock outcrops in freely draining to seasonally moist sand, gravel, peat and loam.
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