Monarrhenus is a genus of plants in the sunflower family. There is only one known species, Monarrhenus salicifolius, native to the Islands of Mauritius and Réunion in the Indian Ocean. Its natural habitat is on rocky cliffs. The species is listed as critically endangered. The genus formerly contained the species "Monarrhenus rufescens", which is now called Pluchea rufescens.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0