Carex platyphylla
Broad-leaved sedge
Image of Carex platyphylla

Photo by Susan R. Crispin 

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Key Characteristics

Densely clumped sedge of rich mesic forests; leaves very wide (1.5-4 cm) and strongly glaucous; culms numerous but weak and lax; perigynia sharply triangular.

Status and Rank

  • State Status: E
  • State Rank: S1
  • Global Rank: G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Berrien11981
Leelanau11988
St. Clair11988
Van Buren11983
Distribution map for Carex platyphylla

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 mesic and dry-mesic forests, especially those formed on dunes.

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

Beech, sugar maple, basswood, tulip poplar, white ash, bitternut hickory, wild leek, ginger, cut-leaved toothwort, dutchman's breeches, yellow trout lily, Virginia waterleaf, false rue anemone, woodland phlox, common trillium, ginseng, goldenseal, chokecherry, columbine, wild oats, false Solomon’s seal, hepatica, trillium, plantain-leaved sedge, red baneberry, jack-in-the-pulpit, and marginal woodfern.

Management

The species requires a full canopy and rich understory conditions. Maintain healthy intact, mature forests. When possible, leave large tracts of unharvested forests and allow natural processes to operate unhindered.

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 28, 2017]

More Information

See MNFI Species Abstract

References

Survey References

Technical References

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