Majín-Ladino, A.F., Paz-López, C. and Jaramillo, M.A. 2026. A new species of Pentagonia (Rubiaceae, Dialypetalantheae) from Santander, Colombia, with an identification key to the Colombian species. Webbia. (Aug. 2026). DOI:https://doi.org/10.36253/jopt-20601.