[4] Caladenia rosea is a terrestrial, perennial, deciduous, herb with spheroid, annually replaced tubers situated 8–15 cm below the soil surface and forming a single, hairy, linear leaf, tinged purple and usually with darker purple veining below, 5–15 cm (2–6 in) long and 4–8 mm (0.2–0.3 in) wide.

There are up to three flowers borne on a slender, fine, sparsely silky-hairy raceme, 10–25 cm (4–10 in) tall, with a bract in halfway up the stem.

[citation needed] The first formal description of this orchid was by Kingsley Dixon and Maarten Christenhusz in 2018, but the species was initially not adopted by Florabase.

The open jarrah (Eucalyptus marginata) and marri (Corymbia calophylla) woodland has an understory of Banksia sessilis, Conostylis setosa, Hypocalymma robustum, Orthosanthus laxus, Xanthorrhoea preissii, Phyllanthus calycinus and Stylidium species.

[citation needed] Caladenia rosea is putatively mimicking flowers of the Swan River myrtle (Hypocalymma robustum), which has a similar colour and scent.