a mineral wetland that is periodically submerged by standing or inflowing water from the surrounding area

a treeless wetland whose shallow water supports dense stands of mostly emergent plants (rooted in mud but with most of their foliage above water)

Open wetlands that occur along rivers and lakes.

no salt in water of marsh; less than .5 salinity parts per thousand; no taste of salt

an area which is dominated by herbaceous plants with roots in soil covered part or all the time by fresh water and leaves held above water.