Prasophyllum brownii Rchb.F.

Plants 500–1,200 mm tall. Free part of leaf to 220 × 7–10 mm. Spike 100–180 mm long, 30–90-flowered. Ovary sessile, long, green, appressed. Flowers crowded, scented, 16–20 × 12–15 mm, pale green to tan with brown stripes, labellum lamina white, callus green. Dorsal sepal 8–10 × 4–5 mm, curved forwards. Lateral sepals fused (base and tips free), erect behind labellum, each sepal 9–11 × 2–2.5 mm, margins incurved. Petals 7–9 × 2–2.5 mm, incurved or obliquely erect. Labellum shortly stalked, elliptic, gently recurved near middle, 9–11.5 × 7–8.5 mm, margins wavy/crinkled. Callus broad, extending well past labellum bend.

Relatively widespread and locally common; found growing in swamps, seasonally wet flats and also among shrubs and heath in high-rainfall forest in freely draining soil.