Carex decomposita
Log sedge

Key Characteristics

Clumped sedge of southern swamps; sheaths dark-spotted, culms stout; inflorescence long (7-15 cm) with numerous branches; perigynia flattened, olive-green.

Status and Rank

  • State Status: X
  • State Rank: SX
  • Global Rank: G3G4

Occurrences

No known occurrences in Michigan

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

The only Michigan specimen was collected from a wet swamp along the River Raisin in 1832.

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.

Feel free to send questions and comments to Brad Slaughter at slaugh14@msu.edu.

Associated Plants

Poorly known; if similar to Ohio occurrences, this species should occur with such plants as silver maple, buttonbush, false nettle, wood nettle, water-parsnip, manna grass, and water horehound.

Management

The species would likely require conservation of habitat, including protection of overstory and maintenance of the hydrological regime.

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 Apr 24, 2017]

References

Survey References

Technical References

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