It has a single narrow leaf and up to seven greenish and white flowers with reddish or mauve markings.

[1][3][4][5] The white bunny orchid was first formally described in 1840 by John Lindley who gave it the name Eriochilus latifolius and published the description in A Sketch of the Vegetation of the Swan River Colony.

[2] The specific epithet (dilatatus) is a Latin word meaning "spread out", "enlarge", or "extend".

[8] The swamp bunny orchid grows in woodland, shrubland and in shallow soil on granite outcrops between Dirk Hartog Island and Israelite Bay.

dilatatus is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.