It is only known from a small coastal area near Cape Leeuwin where it grows in clumps of ten or more.Caladenia caesarea subsp.

The labellum is mustard-yellow with brownish-red stripes, projects prominently, has an irregularly serrated edge and two rows of shiny yellow calli along its centre.

Flowering occurs from August to mid-September and is followed by a non-fleshy, dehiscent capsule containing a large number of seeds.

Domin's description was published in Journal of the Linnean Society, Botany[5][6] but in 1989 Mark Clements and Stephen Hopper raised it to species status.

[1] The epithet (maritima) is a Latin word meaning "of the sea",[9] referring to the "coastal habitat of this species".