Pterostylis ×aenigma

Flowering plant to 30 cm tall. Rosette leaves 4–8, ovate to oblong, 4–6 cm long, 1.5–2 cm wide, more or less sessile, margins flat. Flower solitary, 4–4.5 cm long, semi-nodding, green and white with brownish front and apex; galea apex decurved to flat; dorsal sepal acuminate, exceeding the petals; lateral sepals erect, loosely embracing the galea leaving a lateral gap, sinus deeply v-notched when viewed from the front, barely bulging when viewed from the side, free points linear-tapered to filiform, 2.5–3.5 cm long, erect; petals flared. Labellum narrowly linear-lanceolate, 18–21 mm long, 3.5–4 mm wide, dark brown, apex blunt, tip protruding from the sinus in the set position. Flowers Nov.–Dec.