During our floristic studies in southern Peloponnesus (Greece), specimens of a chasmophytic Campanula with an uncommon pinnatifid foliage were observed on the walls of the Kelefa fortress on the Mani Peninsula. After detailed morphological comparisons with comprehensive material of C. sect. Quinqueloculares from southern Greece, we identified the species as C. kamariana, a recently described endemic of Peloponnesus. Our morphological analysis of specimens collected from the Kelefa fortress revealed some deviations from the original description of the taxon. Therefore, here we provide an amended description of C. kamariana based on newly collected specimens and information on two additional localities where this local endemic occurs.