Scleria triglomerata
Tall nut rush
Image of Scleria triglomerata

Photo by Ryan P. O'Connor 

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Key Characteristics

Tall nut-rush (1 m) of sandy prairies and wetland margins; stem triangular; inflorescence with several spikelets; achenes bony-white and globose with a smooth surface.

Status and Rank

  • State Status: SC
  • State Rank: S3
  • Global Rank: G5


County NameNumber of OccurrencesYear Last Observed
St. Clair21999
St. Joseph21950
Distribution map for Scleria triglomerata

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.


Tall nut-rush is found in dry or moist, open to shaded sandy ground, in prairies, and in borders of marshes.

Natural Community Types


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

Tall beak-rush, pale spiked lobelia, cordgrass, bluejoint grass, twig-rush, sedges, bushy aster, black-fruited spike-rush, umbrella-grass, northern clubmoss, panic grass, cross-leaved milkwort, bald 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, buttonbush, rush, sedges, shrubby cinquefoil, swamp milkweed, big bluestem, Indian grass, Sullivant's milkweed, purple milkweed, swamp thistle, marsh blazing star, whorled loosestrife, grass-of-Parnassus, smooth hedge nettle, swamp rose, Missouri ironweed, joe-pye weed, common bone set, spike-rush, little bluestem, bee-balm, butterfly milkweed, and Riddell's goldenrod.


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 [Accessed Mar 17, 2018]


Survey References

Technical References

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