The female part of a flower that is sticky and collects pollen is called the stigma.

Here's a breakdown of how it works:

* Stigma: The sticky, receptive top part of the pistil (the female reproductive organ of a flower).

* Pollen: Tiny grains produced by the male part of the flower (the stamen).

* Pollination: The process where pollen is transferred from the stamen to the stigma.

The stigma's sticky surface helps to trap pollen grains and prevents them from blowing away. Once pollen reaches the stigma, it travels down the style (the tube connecting the stigma to the ovary) to fertilize the ovules (eggs) within the ovary.