Introduction
Barren Complexes: B2.1B2.1 Lichens on Lava (Seward Peninsula) - B3d.1B3d.1 Acidic mountain complexes (St. Lawrence Is.) - B3e.1B3e.1 Acidic mountain complexes (Brooks Range) - B3e.2B3e.2 Acidic mountain complexes (NW Alaska) - B3e.3B3e.3 Acidic mountain complexes (Kuskokwim Mtns.) - B4d.1B4d.1 Nonacidic mountain complexes (Seward Peninsula) - B4d.2B4d.2 Nonacidic mountain complexes (St. Lawrence Is.) - B4e.1B4e.1 Nonacidic mountain complexes (Brooks Range) - B4e.2B4e.2 Nonacidic mountain complexes (NW Alaska)
Non-Tussock Graminoid Tundras: G3.1G3.1 Moist nonacidic tundra (N. Arctic Coastal Plain) - G3.2G3.2 Moist nonacidic tundra (St. Lawrence Is.) - G3.3G3.3 Moist nonacidic tundra (Arctic Foothills, Seward Peninsula)
Tussock Graminoid Tundras: G4.1G4.1 Tussock tundra (entire map) - G4.2G4.2 Lichen-rich tussock tundra (Seward Peninsula) - G4.3G4.3 Tussock tundra on sands (Arctic Coastal Plain)
Prostrate Dwarf-Shrub Tundras: P2.1P2.1 Dry tundra (St. Matthew Is.)
Erect Dwarf-Shrub Tundras: S1.1S1.1 Shrubby, tussock tundra (NE Alaska) - S1.2S1.2 Dwarf-shrub, lichen tundra (NW Alaska) - S1.3S1.3 Dwarf-shrub tundra on volcanic rock (Yukon-Kuskokwim Delta) - S1.4S1.4 Dwarf-shrub, lichen tundra (Kuskokwim Mtns.)
Low-Shrub Tundras: S2.1S2.1 Willow-birch tundra (entire map) - S2.2S2.2 Alder shrublands (entire map)
Wetlands: W1.1W1.1 Wet acidic coastal complex (N Alaska) - W1.2W1.2 Wet nonacidic coastal complex (N Alaska) - W2.1W2.1 Wet acidic complex (N Alaska, Seward Peninsula) - W2.2W2.2 Wet nonacidic complex (Subzone D, N Alaska) - W3.1W3.1 Wet acidic complex with tussock tundra (W Alaska) - W3.2W3.2 Wet acidic complex with dwarf-shrub tundra (lower parts of Yukon-Kuskokwim Delta) - W3.3W3.3 Wet acidic complex with low-shrub tundra (Yukon-Kuskokwim Delta) - W3.4W3.4 Wet acidic complex with dwarf-shrub tundra (inland parts of Yukon-Kuskokwim Delta) - W3.5W3.5 Wet acidic complex (Nunivak Is.) - W3.6W3.6 Wet nonacidic complex (warmer parts of NW Alaska) - W3.7W3.7 Wet coastal saline tundra (Yukon-Kuskokwim Delta)

W3.4 Wet acidic complex with dwarf shrub tundra (inland parts of Y-K Delta)

Wet sedge, moss communities (comm. 59) in complex with lakes and drier tussock-graminoid, shrub communities (G4.1, comm. 41).  Interior portions of the Yukon- Kuskokwim Delta, Subzone E.

(See G4.1)

Plant Communities:

Community 41

Northern Beringian Islands: Sphagno-Eriophoretum vaginati, tussock tundra on acidic fine grained soils (Walker et al. 1994) (Imnavait Creek).

Beringian Alaska: Cottongrass-sedge-dwarf heath shrub complex (Hanson 1953); Tussock dwarf-shrub tundra (Racine and Anderson 1979); 42B- low shrub cottongrass tussock tundra, 60 - lichen tussock tundra (Swanson and Schuman 1985); C2,C8,C19,QC1, QC2,QC45  (Raynolds et al. 2002) (Seward Peninsula).

Map Units M11, M14 (Tande and Jennings 1986); Map Unit 71 - lowland moist low-scrub (Jorgenson 2000); Sites BB10-13, MM5,7 (Talbot 1983) (Yukon-Kuskokwim Delta).

Tussock sedge: Eriophorum vaginatum, Carex bigelowii;
Erect dwarf shrub: Betula nana, Ledum decumbens, Vaccinium vitis-idaea, Empetrum hermaphroditum, Cassiope tetragona, Rubus chamaemorus;
Forb: Pyrola grandiflora, Bistorta plumosa, Saxifraga nelsoniana;
Moss: Sphagnum spp., Hylocomium splendens, Aulacomnium turgidum, Dicranum spp., Polytrichum strictum;
Lichen: Cladina spp., Cladonia amaurocraea, Cetraria spp., Dactylina arctica

Community 59

Map Unit 5, 22 (Talbot et al. 1985); Map Unit W3e, W4 (Tande and Jennings 1986) (Yukon-Kuskokwim Delta).

Sedge: Carex aquatilis;
Erect dwarf shrub: Betula nana, Empetrum nigrum, Ledum palustre ssp. decumbens, Vaccinium uliginosum;
Moss: Sphagnum spp.;
Lichen: Cladina spp., Flavocetraria spp.