Transition mire can be quite variable in composition and appearance, as it is ‘transitional’ between calcareous fen and alkaline fen and can lean towards either. The habitat is typically very wet and bottle sedge (Carex rostrata) is a common and often dominant species, though other species such as marsh cinquefoil (Potentilla palustris), bogbean (Menyanthes trifoliata), cottongrass (Eriophorum angustifolium) and lesser tussock sedge (Carex dianda) can also be locally dominant. These reference states are described below.