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Variation in anatomy and leaf hydraulic traits between two forms of A. filix-femina. A, Images of a representative leaf taken from the wild-type and Frizelliae forms of A. filix-femina (scale bar = 40 mm). B, Mean maximum leaf hydraulic conductance (n = 4 ± se). C, Leaf capacitance (n = 4 ± se) for each form. Stars denote a significant difference between means (**P < 0.01, t test).
