Most people recognize cattails, but here’s something you might not know about them. They have both male and female flowers on the same stalk. In this photo, the green portion near the bottom is a dense group of very tiny female flowers. The brown part at the top is the group of male flowers. After the female flowers have been pollinated, the male flowers fall off. There are two kinds of cattails in Minnesota. This is the Common Cattail because there is no space between the male and female flowers. The Narrow-leaved Cattail has a short length of bare stem between the two kinds of flowers.