Bracken is a type of fern. It is found worldwide, with the ability to cover large areas. Specifically, it has coarse lobed fronds (large, divided leaves), which it is particularly known for. Bracken is a type of fern, rather than a flower or grass, because of its characteristics shared by other ferns. For example, it sexually reproduces through its spores (whereas flowers reproduce through pollination, and grass reproduces by planted seeds).