Roepera similis (synonym Zygophyllum simile) is a succulent annual herb native to Australia.

It grows as a prostrate or erect annual herb, branching from the base and reaching a height of from four to 60 centimeters.

[2] Roepera similis was first described in 1990 by Hansjörg Eichler as Zygophyllum simile, based on a specimen has collected from the Musgrave Ranges in South Australia in 1963.

[3] It was transferred to the genus Roepera in 2003,[1] when Zygophyllum as then circumscribed was found not to be monophyletic.

[4] It occurs in every mainland state of Australia, favouring red or grey sandy soils.