Pterostylis cardiostigma

Pterostylis cardiostigma is a terrestrial, perennial, deciduous, herb with a large, heart-shaped underground tuber. There are between four and seven upright leaves on the flowering stem, the uppermost leaf higher than the flower. The leaves are erect, linear to lance-shaped, 80–280 mm (3–10 in) long and 10–20 mm (0.4–0.8 in) wide, with a prominent red keel. The flower is green with fine white stripes and pink or red tips and is borne on a flowering stem 60–350 mm (2–10 in) tall. The dorsal sepal and petals are fused, forming a narrow hood or "galea" over the column and the dorsal sepal is 5–10 mm (0.2–0.4 in) longer than the petals. The lower half of the galea is vertical, the upper part curves forward, but never as far as the horizontal. The lateral sepals are more or less erect, much higher than the galea and have long, narrow, red, thread-like tips. The labellum is curved, red and pointed. Although it can only be seen by opening the flower, the stigma has a characteristic heart shape.