Carex jonesii Herbaceous Alliance
Jones’s sedge turf

USDA Ecological Section Map

Summary Information

  • Primary Life FormHerb
  • Elevation900-3200 m
  • State RarityS3
  • Global RarityG4
  • DistributionUSA: CA, CO, ID, MT, NV, OR, UT, WA, WY
  • Endemic to CaliforniaNo
  • Endemic to California Floristic Province and DesertsNo
  • Date Added2009/09/01

Characteristic Species

Carex jonesii is dominant or co-dominant in the herbaceous layer with Achillea millefolium, Bistorta bistortoides, Carex aquatilis, Carex nebrascensis, Deschampsia cespitosa, Dodecatheon conjugens, Eleocharis quinqueflora, Glyceria elata, Juncus nevadensis, Mimulus tilingii, Phleum alpinum, Poa pratensis, Taraxacum officinale, Trifolium longipes, Trifolium monanthum and Viola macloskeyi. Emergent trees or shrubs may be present at low cover, including Betula glandulosa, Salix eastwoodiae or Salix geyeriana. Mosses may be abundant, including Sphagnum spp.

Vegetation Layers

Herbs < 75 cm; cover is continuous.

Membership Rules

  • Carex jonesii > 5% absolute cover with lower cover of other sedges, such as C. aquatilis, C. lenticularis, C. scopulorum, C. utriculata, or C. vesicaria, and lower cover of most other plants, such as Deschampsia cespitosa, Juncus nevadensis, and Veratrum californicum (Potter 2005).


Seasonally saturated meadows, seeps, stream banks and transitional fens. Soil surfaces are hummocky. The USFWS Wetland Inventory (1996 national list) recognizes Carex jonesii as a FACW plant.

Other Habitat, Alliance and Community Groupings

MCV (1995) Sedge series
NVCS (2009) Not treated
Calveg Wet grasses and forbs
Holland Wet montane meadow, Wet subalpine or alpine meadow, Freshwater seep, Fen
Munz Alpine fell-fields, Freshwater marsh
WHR Alpine dwarf-shrub, Wet meadow
CDFW CA Code 45.162.00

National Vegetation Classification Hierarchy

Formation Class Mesomorphic Shrub and Herb Vegetation (Shrubland and Grassland)
Formation Subclass Temperate and Boreal Shrubland and Grassland
Formation Temperate Grassland, Meadow, and Shrubland
Division Vancouverian and Rocky Mountain Grassland and Shrubland
Macro Group Western Cordilleran montane-boreal wet meadow
Group Western cordilleran montane-boreal mesic wet meadow