raunkiaer

Updated: May 22, 2025

Raunkiaer, who has studied experimentally a dozen types from Denmark, found them constant, but observed that some of them have no pollen at all, while in others the pollen, though present, is impotent. It does not germinate on the stigma, cannot produce the ordinary tube, and hence has no fertilizing power. But the young ovaries do not need such fertilization. They are sufficient unto themselves.

Hugo de Vries - Species and Varieties, Their Origin by Mutation