Table 3. Effect of supplemental hand-pollination 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 | 0.31 | 4.47 | 0.036 |
| Treatment (T) | 1 | 5.18 | 74.58 | <0.001 |
| Site (S) | 1 | 0.11 | 1.57 | 0.212 |
| T x S | 1 | 0.01 | 0.08 | 0.771 |
| Error | 113 | 0.07 | ||
| Achene weight | ||||
| Plant size (covariate) | 1 | 14.21 | 18.12 | <0.001 |
| Treatment (T) | 1 | 75.89 | 96,77 | <0.001 |
| Site (S) | 1 | 0.44 | 0.56 | 0.455 |
| T x S | 1 | 2.23 | 2.85 | 0.094 |
| Error | 113 | 0.78 | ||
ANCOVA summary of the effects of pollination treatment (open-pollinated vs. supplemental hand 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.