Roylea is a genus of flowering plant in the Lamiaceae family, first described as a genus in 1830. It contains only one known species, Roylea cinerea, native to the Western Himalayas of Nepal and northern India.
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