Oreorhamnus

{{Short description|Genus of flowering plants}}

{{Speciesbox

|genus = Oreorhamnus

|parent_authority = Ridl. (2020)

|species = serrulata

|authority = Ridl. (1920)

|synonyms =

• Frangula borneensis {{small|(Steenis) Hauenschild (2016)}}
• Oreorhamnus serrulatus {{small|Ridl. (1920), orth. var.}}
• Rhamnus borneensis {{small|Steenis (1934)}}

|synonyms_ref = [https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:717680-1 Oreorhamnus serrulata Ridl.] Plants of the World Online. Retrieved 19 March 2024.

}}

Oreorhamnus serrulata is a species of flowering plant in the buckthorn family, Rhamnaceae. It is native to Borneo and Sumatra. It is the sole species in genus Oreorhamnus.