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Rates of opening during WWRs to humidity (Vh; white bars) and leaf excision (Ve; hatched bars) and the ratio of those rates (Ve/Vh; black bars) in woody and herbaceous species. n = 10 species and 29 experiments in each group. Values shown are means ± se. * P < 0.05, ** P < 0.005, *** P < 0.001.
