| Furthermore, behavioral data reveal that pollen collection commonly is followed by geitonogamous pollination. |
| Consequently, it reduces male fitness because geitonogamous pollen grains are barred from fertilizing ovules. |
| Unless pollen is transported to another plant, geitonogamous self-pollinations therefore become more likely when plants are visited. |
| In the Faroes Islands, Hagerup indicated that species with large inflorescences tended to be geitonogamous. |
| Because self-incompatibility operates after pollination, it reduces geitonogamous self-fertilization but not geitonogamous pollination. |
