long-term tussock among northern marsh (delta

longterm tussock northern swamp marshes river delta high tufted sedge gracilis plant parcel water forgerons myosotis palustris hummock lovemenot scorpion grass snakegrass forgery carex cespitosa helad sterrhad helophyte paludal marsh plants helium aquatic waterinhabiting terrestrialization mire peat bog wash letch swampland waterlogged area parcella waters muskeg stagnant cattail