About Corybas incurvus D.L.Jones & M.A.Clem.
Corybas incurvus D.L.Jones & M.A.Clem., commonly known as the slaty helmet orchid, is a terrestrial, perennial, deciduous herb. It produces a single broad egg-shaped to heart-shaped leaf that measures 15–30 mm long and 15–25 mm wide. The upper surface of the leaf is dark green, while the lower surface is silvery green. A single dark purple flower grows from each plant, measuring 12–17 mm long and 10–15 mm wide. The dorsal sepal is greenish with purple markings, 18–22 mm long and 12–14 mm wide. It curves forward to form a hood that covers the labellum. The lateral sepals are linear, about 5 mm long and 0.5 mm wide, and are joined at their base. The petals are approximately 3 mm long and 0.5 mm wide, and often have a two-lobed tip. The labellum is tube-shaped near its base, with the tube measuring about 10–15 mm long. The tube opens into an additional broad, flattened section that is 10–15 mm long. There is a white patch in the center of the labellum, its edges curve inwards and bear a small number of short teeth. Flowering occurs between June and August. This orchid grows in moist heath, woodland, and forest. Its distribution ranges south from Cowra in New South Wales, covers all of Victoria except the north-west region, extends to the south-east of South Australia, and also includes Tasmania.
