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Correction factors (CF) for three leaf shape schemes. Leaf shape definitions are provided in Table 1. Dotted black line indicates a CF of 1, for which the product of leaf length and width corresponds to the size of a rectangle. Dashed grey line indicates the CF of 2/3. Significant differences of the leaf shape-specific CF to the CF of 2/3 are indicated (***P ≤ 0.001; n.s., P > 0.05). Green boxplots indicate lobed leaves and blue boxplots indicate unlobed leaves.
