| species | r | R2 |
| F. palmatus | 0.89*** | 0.79*** |
| F. hygrometrica var. calvescens | 0.65* | 0.82* |
| A. aestivum | 0.80* | 0.61* |
| C. depressa | 0.82* | ns |
| F. zollingeri | 0.55* | 0.24* |
| V. vesicularis var. portoricensis | ns | ns |