Strobili are reproductive structures found in certain plants, particularly in conifers and ferns. They are often cone-shaped and contain spores or seeds, playing a crucial role in the plant's reproduction process. In gymnosperms, strobili are typically woody and can be seen as the familiar pine cones. In ferns, strobili can appear as clusters of spore-producing structures called sori. These sori are usually located on the undersides of leaves and release spores for reproduction. Overall, strobili are essential for the life cycle of various plant species, aiding in the dispersal of genetic material.