PCA plots for the <i>Gypsophila</i> taxa studied.

The environmental space is defined by the first two axes of the PCA analysis and it is limited by the minimum and maximum environmental values across the whole study area. Contour lines draw suitability values [58]. The different taxa have been plotted in pairs to make comparisons easier: (A) G. bermejoi (red) vs. G. struthium subs. struthium (blue), (B) G. bermejoi (red) vs. G tomentosa (blue), (C) G. struthium subs. struthium (red) vs. G. tomentosa (blue), (D) G. struthium subs. struthium (red) vs. G struthium subsp. hispanica (blue).