Table 1. Numerical Coefficients for the Equation y = y0 + ax + bx2 for Models Based on Cluster Analysis, Clade, and Leaf Thickness.
NA, Model equation could not be fitted to data.
| Model | y0 | a | b |
|---|---|---|---|
| Cluster a | 10.50834 | 2.31279 | −0.01941 |
| Cluster b | 50.45836 | 0.59300 | −0.00321 |
| Cluster c | 76.51942 | 0.27804 | −0.00191 |
| Cluster d | 58.27920 | 0.88874 | −0.00699 |
| Cluster e | NA | NA | NA |
| Cluster f | 88.74845 | −0.38816 | 0.00250 |
| Fern | NA | NA | NA |
| Cycad | 59.28052 | 0.53491 | −0.00348 |
| Conifer | 45.26811 | 0.99436 | −0.00787 |
| Ginkgo | 66.61461 | 0.70577 | −0.00672 |
| Basal angiosperm | 61.51000 | 1.24990 | 0.00160 |
| Magnoliid | 74.46951 | 0.30182 | −0.00223 |
| Monocot | 65.78703 | 0.36470 | −0.00249 |
| Eudicot | 71.05103 | 0.33471 | −0.00236 |
| Thin leaf | 69.24298 | 0.35299 | −0.00229 |
| Thick leaf | 64.36971 | 0.33783 | −0.00245 |