Caladenia busselliana Hopper & A.P.Br.

Leaf 100–200 × 5–10 mm. Flower stem 200–300 mm tall, 1–3-flowered. Flowers 50–80 mm across, cream to pale yellow with occasional reddish markings; sepals with thin, light brown clubs 10–20 mm long; petals lacking clubs. Dorsal sepal erect, 30–45 × 3–4 mm. Lateral sepals spreading then downcurved, 50–55 × 4–5 mm, divergent. Petals horizontal or decurved, 30–45 × 3–4 mm. Labellum 15–20 × 10–12 mm, wholly white or with pink markings; margins with 7–9 spreading teeth to 6 mm long; tip recurved. Calli to 1.5 mm long, white, pink or pale red, in 4 rows. Column 15–18 × 6–8 mm, broadly winged, creamy yellow with pink markings.

Highly localised; consisting of less than 50 plants in a few populations. Found growing in winter-wet swamps and depressions in dense shrubby jarrah/marri forest in acidic or limey, sandy soils.