Eurasian Watermilfoil
This water-loving plant spreads quickly in the shallow parts of different waterways. Eurasian milfoil is originally from Europe, Asia, and Africa. It looks delicate and fragile from afar. But it grows to create pretty thick mats in the water that it grows in and blocks off sunlight, which then kills off native plants, according to the U.S. Department of Agriculture.
Like a lot of the plants in this list, younger milfoil plants can be eaten as a vegetable. Don’t eat the plant if you aren’t sure about the cleanliness of the water it is growing in. But if you’re sure the water is clean, it’s safe to munch on.
