Dianthus borbonicus a new species occurring in North-Western Sicily is described and illustrated. It is a rare chasmophyte
belonging to the D. sylvestris group, which is exclusive of a rupestrian stand near Rocca Busambra (Ficuzza). Its macro- and
micromorphological features (seed testa sculptures, and leaf anatomy), ecology, conservation status and a comparison with
the related species are provided too
