Ricinocarpos tuberculatus is a species of flowering plant in the family Euphorbiaceae and is endemic to the south-west of Western Australia.

Ricinocarpos tuberculatus is an erect, monoecious or dioecious shrub or small tree that typically grows to a height of up to 4 m (13 ft), its young branchlets glabrous.

[2][3] Ricinocarpos tuberculatus was first formally described in 1864 by Johannes Müller Argoviensis in the journal Linnaea, from specimens collected near the Swan River by James Drummond.

[6] This species grows in shrubland between granite boulders and is restricted to the area between Kellerberrin and Bruce Rock in the Avon Wheatbelt bioregion of south-western Western Australia.

[2][3] Ricinocarpos tuberculatus is listed as "Priority Two" by the Western Australian Government Department of Biodiversity, Conservation and Attractions,[3] meaning that it is poorly known and from only one or a few locations.