Pterostylis alveata

Flowering stem to 20 cm tall, stem leaves 3–5, spreading. Rosette leaves 2–5, ovate, 1–2.5 cm long, 5–15 mm wide, petiolate, margins flat or crisped. Flower 12–15 mm long, erect, green and white, shiny; dorsal sepal with a filiform point c. 5 mm long; lateral sepals erect, tightly embracing the galea, sinus flat, with a small central notch, protruding prominently when viewed from the side, free points 12–15 mm long, filiform, erect; petals green, margins not flared. Labellum oblong to oblong-elliptic, 8–10 mm long, 2–3 mm wide, red-brown towards the apex, the tip slightly protruding above the sinus in the set position. Flowers Apr.–Jun.