Why Is a Stigma Sticky?

Sometimes, the stigma, a surface located at the top of a flower's pistil, also traps pollen using hairs, flaps and other specially designed surfaces. Depending on the type of flower, stigmas vary in shapes and sizes. While some stigmas are long and thin, others feature round shapes and feathered or stringy borders. The stigma connects to the ovary though the style, a part of the flower that resembles a long tube.