Birdsfoot Trefoil, Alsike clover, Orchard Grass.The trefoil is the most resistant to flooding,but a little slow to establish. Will frost seed though. If real wet Reed's Canary grass, but it can get invasive. keep it away from streams orat least be sure tocut before going to seed. It ishell of wild rice beds. Soaks up the water though. If using for hay, get a low Alkaloid (sp) type.