Petrogenia

{{Short description|Genus of plants}}

{{Speciesbox

| image =

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| genus = Petrogenia

| parent_authority = I.M.Johnst.

| species = repens

| authority = I.M.Johnst.

}}

Petrogenia is a monotypic genus of flowering plants belonging to the family Convolvulaceae. The only species is Petrogenia repens.{{cite web |title=Petrogenia I.M.Johnst. {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:295195-2 |website=Plants of the World Online |access-date=27 May 2021 |language=en}}

Its native range is Texas to Northeastern Mexico.