Pair-wise correlations of all measured traits, compared separately for each time of measurement and each garden.

The upper value is the Pearson’s r and the lower value is the p-value for a simple linear regression. Measures of light-saturated photosynthetic rate are indicated by Aa area-based measures and Am for mass-based measures. Stomatal conductance is indicated by g. To correct the p-value for multiple tests within gardens and within time steps, the adjusted p-value for Jonaskop is 0.005 and for Kirstenbosch it is 0.0018. Statistically significant correlations are bolded.