Fig. 2.

Relationships between the first two principal components (PC1 vs. PC2) of the principal component analysis (PCA) computed on leaf morphometric variables of the seven Q. ilex provenances. Selected leaf variables were the most robust to separate provenances: leaf length, petiole length, length/width ratio, number of secondary veins (No. veins), apex pointed (A pa), margin entire (M en), teeth sharply pointed (T sp), secondary venation mixed craspedodromous and weak brochidodromous (SV mc and SV wb), course of secondary veins straight–curved (CV sc) and form orbiculate (F or). The symbols correspond to each plant and are colour-coded according to each morphotype: black, ‘rotundifolia’; grey, ‘intermediate’; white, ‘ilex’.