Caladenia thinicola Hopper & A.P.Br.

Leaf 130–260 × 6–7 mm. Flower stem 450–500 mm tall, 1–4-flowered. Flowers 50–60 mm across, creamy to yellowish green with red suffusions and markings; sepals with thin brown clubs 10–15 mm long; petals lacking clubs. Dorsal sepal erect, c. 40 × 2 mm. Lateral sepals spreading stiffly downwards, c. 40 × 3 mm, divergent. Petals similarly arranged, c. 35 × 2 mm. Labellum 15–16 × 12–13 mm, yellowish green with a maroon apex; margins with thin, erect, greenish teeth to 8 mm long; apex recurved. Calli to 1.5 mm long, maroon, in 4 or 6 crowded rows nearly to labellum apex. Column 17–20 × 5–6 mm, translucent green with red markings.

Highly localised in a narrow coastal band; growing on tops and slopes of consolidated dunes in shrubby jarrah/bloodwood forest and heath in deep sand.