The Cattail is a tall, reedy marsh plant that bears brown, furry, fruiting spikes. Cattails are found mainly in temperate and cool regions of the northern and southern hemispheres. Their long, flat leaves help filter contaminates from water and wildlife. They are used for making mats and chair seats. Important to wildlife, they are often cultivated ornamentally for pond plants and dried flower arrangements. The leaves, which swell when wet, were used for caulking cracks in barrels and boats.