Fig. 2
From: Oak leaf morphology may be more strongly shaped by climate than by phylogeny
Box-plot representation of the four quantitative traits measured: Leaf area (LA) (a), leaf mass per area (LMA) (b), length–width ratio (LW) (c) and index of lobation (ILB) (d) in the five macroclimates considered: Arid (ARID), Mediterranean (MED), Winter-dry to Tropical (WdT-TROP), Warm Temperate (WARM_T) and Cold Temperate (COLD_T). Letters indicate statistically significant differences across macroclimates (Tukey test, P < 0.05)