Abstract. A newly discovered natural hybrid, Campanula xkusadasiensis (Campanulaceae: subgenus Campanula, sect. Quinqueloculares), from Kuşadası province (Aydın, Turkey) in western Anatolia, is described and illustrated. This hybrid was identified during field studies and conservation projects, distinguishing itself from its parental taxa, C. lyrata subsp. lyrata and C. hagielia, by morphological differences such as its softly hirsute stems, ovate-cordate basal leaves, and infundibular corolla shape. The hybrid’s micromorphological characters, including seed coat ornamentation and pollen structure, were analyzed using SEM and compared to its parents. The ecological preferences of C. xkusadasiensis indicate a restricted distribution on calcareous rocks within maquis habitats. Its conservation status is assessed as Critically Endangered (CR) due to limited population size, restricted area of occupancy (AOO < 10 km²), and ongoing anthropogenic pressures. This study provides comprehensive data on the hybrid’s taxonomy, habitat, micromorphology, and conservation needs, contributing valuable insights into hybridization within Campanula and supporting biodiversity preservation efforts in western Anatolia.