Principal component analysis, based on the 19 continuous morphological characters, with groups corresponding to the four populations of Centaurea busambarensis and of Rocche del Crasto. PC1: Eigenvalue 0.373, % variance 45.90; PC2: Eigenvalue 0.131, % variance 16.13.

  Part of: Domina G, Di Gristina E, Barone G (2022) A new species within the Centaurea busambarensis complex (Asteraceae, Cardueae) from Sicily. Biodiversity Data Journal 10: e91505.