Here's a breakdown:
* Stigma: The sticky, often bulbous top part of the pistil (the female reproductive organ of a flower). The stigma is specifically designed to capture pollen grains.
* Style: The stalk that connects the stigma to the ovary.
* Ovary: The base of the pistil that contains the ovules (which develop into seeds after fertilization).
When a pollen grain lands on the stigma, it starts the process of fertilization.