Juncus brachycarpus
Short-fruited rush
Image of Juncus brachycarpus

Photo by Elaine M. Chittendon 

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Key Characteristics

Perennial rhizomatous rush of intermittently wet sandy soils; leaves with hard cross-partitions; inflorescence terminal, globose; capsules plump, shorter than tepals; seeds without pale tails; stamens 3.

Status and Rank

  • State Status: T
  • State Rank: S1S2
  • Global Rank: G4G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Allegan11989
Berrien11972
Mason12001
Monroe32015
Newaygo12015
Ottawa12011
St. Clair11999
Wayne82015
Distribution map for Juncus brachycarpus

Updated 7/21/2017. 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

This species is found in areas with a fluctuating water table such as coastal plain marshes, sandy lake edges, dune swales, seepages, sandy marshes, sandy and peaty edges of wetlands, and intermittent wetlands.

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

Found with numerous graminoids associated with coastal plain marshes: bluejoint grass, twig-rush, sedges, bushy aster, black-fruited spike-rush, umbrella-grass, northern appressed clubmoss, panic grass, cross-leaved milkwort, bald-rush, tall beak-rush, tooth-cup, netted nut-rush, hyssop hedge nettle, marsh St John's-wort, pipewort, autumn sedge, meadow beauty, red maple, black gum, pin oak, black chokecherry, dogwoods, and buttonbush.

Management

This species requires conservation of habitat and protection of the hydrology, including maintenance of cyclical drawdown regime and water table. Maintain moist, open habitat. It is also vulnerable to ORV impacts and dredging and filling activities.

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 Sep 20, 2017]

More Information

See MNFI Species Abstract

References

Survey References

Technical References

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