What part of cattails tastes like boiled corn?

The part of cattails that tastes like boiled corn is the young flower spikes, which are found at the top of the stalks. These spikes can be harvested in the spring and early summer before they mature. When cooked, they have a sweet, corn-like flavor and can be used in various dishes or eaten on their own. The immature seed heads can also be cooked and enjoyed similarly.