Caladenia caesarea is a species of flowering plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia.

The plant is 150–350 mm (5.9–13.8 in) high with up to three mustard-coloured or lemon-yellow flowers with a brownish-red labellum, with two rows of glossy yellow calli along its mid-line.

[5] In 1989, Mark Clements and Stephen Hopper raised the variety to species status as Caladenia caesarea in Australian Orchid Research.

[6] In 2001, Hopper and Andrew Brown described three subspecies of C. caesarea in the journal Nuytsia, and the names are accepted by the Australian Plant Census: Subspecies caesarea grows in seasonally wet areas between Wagin, Tenterden and Busselton in the Avon Wheatbelt, Jarrah Forest and Mallee bioregions of south-western Western Australia.

[4][10] Subspecies maritima grows on granite and rock outcrops and is restricted to the Leeuwin-Naturaliste National Park and Ludlow areas of the Jarrah Forest bioregion,[4][11] and subsp.