Some aspects of the pollination mechanism of Viola tricolor L. and Viola X wittrockiana Gams

Pollination experiments on garden pansies (V. X wittrockiana Gams) and V. tricolor L. have shown that the assumption of earlier investigators that the stigmatic cavity is closed, is incorrect. The flower morphology is described especially in relation to the way pollination takes place and to the question which parts of the stigma are receptive to pollen.