King Spider Orchid

Caladenia pectinata is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, hairy leaf, 150–300 mm (6–10 in) long and 10–20 mm (0.4–0.8 in) wide. Up to three red, yellow and pale green flowers 60–100 mm (2–4 in) long and 60–70 mm (2–3 in) wide are borne on a stalk 350–700 mm (10–30 in) tall. The sepals have thick, brown, club-like glandular tips 10–35 mm (0.4–1 in) long. The dorsal sepal is erect, 40–70 mm (2–3 in) long and 2–5 mm (0.08–0.2 in) wide. The lateral sepals are 40–70 mm (2–3 in) long and 6–9 mm (0.2–0.4 in) wide and turn downwards. The petals are 35–45 mm (1–2 in) long, 3–4 mm (0.1–0.2 in) wide and are sometimes spreading otherwise turn upwards. The labellum is 18–25 mm (0.7–1 in) long, 12–18 mm (0.5–0.7 in) wide and creamy-yellow with a dark red, down-curved tip. The sides of the labellum have linear teeth up to 8 mm (0.3 in) long and there are four or six rows of dark red calli along its mid-line. Flowering is from late September to October.

The king spider orchid is widespread between Cataby and Munglinup in the Avon Wheatbelt, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee, Swan Coastal Plain, and Warren biogeographic regions. It is most common between Bremer Bay and Rocky Gully.