Fig. 2.

Pollen that is dislodged from the reproductive parts of flowers either by the abiotic environment or by pollinators has a much lower probability of ever reaching the stigma of another flower. (A) Pollen shows up yellow against the contrasting petal background of Pauridia capensis after a gust of wind dislodged it from the anther. Photo: M. de Jager. (B) Pollen from the anthers of Salvia greggii falls to the ground after being dislodged by a visiting rufous hummingbird. Photo: S. Tekiela – Nature Smart Images.