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Plate 63.— Classification: system Palustrine, CLASS Emergent Wetland, subclass Persistent, dominance type Carex rarijhra- 

 Eriophorum russeolum, water regime Seasonally Flooded, water CHEMISTRY Fresh. Subordinate plants include marsh cinque- 

 foil (Potentilla palustris), bluejoint (Calamagrostis canadensis), Alaska bog willow (Salixfuscescens), crowberry (Empetrum nigrum), 

 dwarf birch (Betula nana), and peat moss (Sphagnum sp.). This type of patterned wetland is commonly referred to as "string 

 bog" or "strangmoor." Seasonally flooded troughs alternate with elongated bog-like ridges or "strings." Strings here rise only 

 30-45 cm (12-18 in) above the troughs. (Manokinak River area, Yukon-Kuskokwim Delta, Alaska; July 1985; Photo by F. C. Golet) 



