What is pollini a?

Pollinia are clusters of pollen grains that are often found in certain flowering plants, particularly orchids. These structures facilitate the transfer of pollen during pollination, helping ensure fertilization. When an insect visits a flower, it may inadvertently pick up pollinia and carry them to another flower, thereby aiding in the plant's reproductive process. Pollinia can be quite sticky, allowing them to adhere to the pollinator more effectively.