Carex wiegandii
Wiegand's sedge
Image of Carex wiegandii

Photo by Bradford S. Slaughter 

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Key Characteristics

Densely clumped sedge of bogs and acidic swamps; leaves 3-5 mm; perigynia flattened and strongly reflexed with toothed beaks.

Status and Rank

  • State Status: SC
  • State Rank: S3
  • Global Rank: G4

Occurrences

County NameNumber of OccurrencesYear Last Observed
Chippewa132008
Delta31996
Luce11999
Mackinac11995
Distribution map for Carex wiegandii

Updated 1/31/2017. Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.

Habitat

Found in thin peatlands on glacial lakeplains, occasionally in open bogs, and often in transition zones between poor conifer swamp and sedge meadow or shrub thickets.

Natural Community Types

Methodology

For each species, lists of natural communities were derived from review of the nearly 6,500 element occurrences in the MNFI database, in addition to herbarium label data for some taxa. In most cases, at least one specimen record exists for each listed natural community. For certain taxa, especially poorly collected or extirpated species of prairie and savanna habitats, natural community lists were derived from inferences from collection sites and habitat preferences in immediately adjacent states (particularly Indiana and Illinois). Natural communities are not listed for those species documented only from altered or ruderal habitats in Michigan, especially for taxa that occur in a variety of habitats outside of the state.

Natural communities are not listed in order of frequency of occurrence, but are rather derived from the full set of natural communities, organized by Ecological Group. In many cases, the general habitat descriptions should provide greater clarity and direction to the surveyor. In future versions of the Rare Species Explorer, we hope to incorporate natural community fidelity ranks for each taxon.

Associated Plants

Trees: Acer rubrum (red maple), Picea mariana (black spruce), Pinus banksiana (jack pine).

Shrubs: Aronia prunifolia (black chokeberry), Chamaedaphne calyculata (leatherleaf), Kalmia polifolia (bog-laurel), Rhododendron groenlandicum (Labrador-tea), Vaccinium angustifolium (low sweet blueberry).

Ground layer: Carex oligosperma (few-seed sedge), C. stricta (tussock sedge), Iris versicolor (northern blue-flag), Onoclea sensibilis (sensitive fern), Scirpus cyperinus (wool-grass), Sphagnum spp. (sphagnum mosses).

Management

Likely requires conservation of hydrology and local disturbance regimes.

General Survey Guidelines

Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement of the investigator.

Survey Methods

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at http://mnfi.anr.msu.edu/explorer [Accessed May 27, 2017]

References

Survey References

Technical References

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