Flowering stem slender, 20–40 cm tall. Leaf-blade to 20 cm long, 2–4 mm diam. at base, erect, apex senescent at flowering. Flowers 8–15, mostly brownish green, fragrant, in an open raceme 5–8 cm long; ovary sessile, obovoid, 5–7 mm long; sepals 5–7 mm long, dorsal sepal ovate-lanceolate, acute, lateral sepals free, ovate-lanceolate, parallel, recurved, apex bidentate; petals 4–5 mm long, linear-lanceolate, spreading, whitish. Labellum sessile, ovate, 4–5 mm long, reflexed at right-angles near middle, lamina white, upper margins crenulate-undulate; callus raised, narrowing distally and extending nearly to labellum apex, brown, papillate. Column appendages oblong, to 2 mm long. Flowers Oct.–Nov.
Closely related to the South Australian Prasophyllum fitzgeraldii, but that species has a darker pink to reddish labellum lamina and the callus plate has a different structure.
True Prasophyllum fitzgeraldii, as represented by the type specimen from the Lofty Ranges, S.Aust., in not believed to occur in Victoria.
