Sigmatanthus
{{Short description|Genus of plants}}
{{Speciesbox
| image =
| image_caption =
| display_parents = 2
| genus = Sigmatanthus
| parent_authority = Huber ex Emmerich
| species = trifoliatus
| authority = Huber ex Emmerich
}}
Sigmatanthus is a monotypic genus of flowering plants belonging to the family Rutaceae. The only species is Sigmatanthus trifoliatus.{{cite web |title=Sigmatanthus Huber ex Emmerich {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:35959-1 |website=Plants of the World Online |access-date=26 September 2021 |language=en}}