Variability of seed dimensions and shape within <i>Phoenix</i> species.

It is calculated as the dispersion of seeds around the related species’ centroid in two PCA spaces obtained from size parameters (Size Var.) and 64 Fourier coefficients related to dorsal and lateral seed shapes (Shape Var.) using the rarefaction method. The values are the average over the mean distance between 20 randomly sampled seeds in one hundred replicates and the standard deviation over the one hundred replicates. The groups derived from Tukey’s test are given into parentheses.