What is the stigma in plant anatomy?

The stigma is a crucial component of the plant reproductive system, specifically within the pistil, which is the female reproductive part of a flower. It is defined as the expanded tip of the style, where pollen landing occurs during the process of fertilization. The stigma's role is to receive and often store the pollen grains, which will then lead to the fertilization of the ovule. This specialized structure is often sticky or feathery to facilitate the capture of pollen from visiting pollinators or from the wind, ensuring successful reproduction.

Understanding the stigma's function is foundational in studying plant reproduction, pollination mechanisms, and overall flower structure, making it vital for horticulture practices and plant care. The other components mentioned, such as the stalk that supports the anther, the part that attracts pollinators, and the base of the flower, each serve different roles within the plant's anatomy and do not define the stigma's distinct function in reproduction.