Table 2. Effects of pollination treatment on the reproduction of two populations of Chaetanthera renifolia.
| Source of variation | DF | MS | F | P-value |
| Percentage of achene set | ||||
| Plant size (covariate) | 1 | 0.01 | 0.58 | 0.499 |
| Treatment (T) | 1 | 12.47 | 385.41 | <0.001 |
| Site (S) | 1 | 0.05 | 1.46 | 0.230 |
| T x S | 1 | 0.01 | 0.09 | 0.754 |
| Error | 67 | 0.04 | ||
| Achene weight | ||||
| Plant size (covariate) | 1 | 1.43 | 0.39 | 0.529 |
| Treatment (T) | 1 | 2.61 | 0.73 | 0.396 |
| Site (S) | 1 | 3.47 | 0.97 | 0.328 |
| T x S | 1 | 1.59 | 0.45 | 0.507 |
| Error | 67 | 3.57 | ||
ANCOVA summary of effects of pollination treatment (autonomous self-pollination vs. hand cross-pollination) and site (La Parva and Piedra Numerada) on the percentage of achene set and achene weight of Chaetanthera renifolia plants. Plant size (diameter) was entered as a covariate. Significant effects are indicated in bold.