About Cyrtostylis oblonga Hook.f.
Cyrtostylis oblonga is a terrestrial, perennial, deciduous herb that grows a single heart-shaped to almost round leaf. The leaf measures 10–40 mm (0.4–2 in) long and 8–17 mm (0.3–0.7 in) wide. Up to four pink or pinkish green flowers, each 8–10 mm (0.3–0.4 in) long, are borne on a thin flowering stem that reaches up to 100 mm (4 in) high. The dorsal sepal is erect, linear to narrow lance-shaped. The lateral sepals are narrow linear and somewhat smaller than the dorsal sepal. The petals are similar in size and shape to the lateral sepals. The labellum is flat and oval, about 10 mm (0.4 in) long and 4 mm (0.16 in) wide, with two round calli at its base and two parallel longitudinal ridges. The column is shorter than the labellum and has two wings that widen towards the tip. Flowering occurs between July and November. This winter orchid grows in scrub, forest, and open areas in the northern part of New Zealand's North Island, and on the Three Kings Islands.
