Pterostylis robusta

Flowering plant to 20 cm tall, stem leaves 3–7, spreading. Rosette leaves 4–10, ovate, 0.7–2.2 cm long, 0.5–1.6 cm wide, petiolate, margins flat or finely crisped. Flower 3–3.5 cm long, erect, green and white with red-brown to brown suffusions and stripes; dorsal sepal with a filiform point 2–4 mm long; lateral sepals erect, tightly embracing the galea, sinus flat with a shallow central v-notch, protruding in a shallow curve when viewed from the side, free points to 2–3 cm long, filiform, erect, often curved forwards at the apex; petal margins not flared. Labellum oblong-lanceolate, suddenly tapered in the distal third, 12–15 mm long, 3–4 mm wide, dark reddish brown, the tip just visible from the sinus in the set position. Flowers Apr.–Aug.