Oreonesion

{{Short description|Genus of plants}}

{{Speciesbox

| image =

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| genus = Oreonesion

| parent_authority = A.Raynal

| species = testui

| authority = A.Raynal

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Oreonesion is a monotypic genus of flowering plants belonging to the family Gentianaceae. The only species is Oreonesion testui.{{cite web |title=Oreonesion A.Raynal {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:16665-1 |website=Plants of the World Online |access-date=27 May 2021 |language=en}}

Its native range is Western Central Tropical Africa.