Dune Helmet-Orchid

About

Corybas expansus, commonly known as the flared helmet orchid or dune helmet orchid is a species of terrestrial orchid that is endemic to South Australia. It has a heart-shaped to more or less round leaf and a single purplish flower with greenish or transparent areas.

How to spot it

Corybas expansus is a terrestrial, perennial, deciduous, herb which forms small colonies. It has a broad heart-shaped or almost round leaf 15–30 mm (0.6–1 in) long and 18–30 mm (0.7–1 in) wide. The leaf is bright green on the upper surface and silvery green on the lower side. The single flower is erect, reddish purple with greenish or translucent areas, 12–15 mm (0.5–0.6 in) long and 11–13 mm (0.4–0.5 in) wide. The dorsal sepal is mostly transparent green, 12–16 mm (0.5–0.6 in) long and 5–7 mm (

Documented on these trails

Found in

• Dhilba Guuranda-Innes National Park — Flinders Ranges & Outback SA hikes