Beckmannia syzigachne
Slough grass
Image of Beckmannia syzigachne

Photo by Susan R. Crispin 

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Key Characteristics

Tufted annual of wet meadows and shorelines; leaves flat, scabrous, 4-10 mm wide; spikelets round in scattered compact 1-sided spikes.

Status and Rank

  • State Status: T
  • State Rank: S2
  • Global Rank: G5


County NameNumber of OccurrencesYear Last Observed
St. Clair51996
Distribution map for Beckmannia syzigachne

Updated 5/15/2018. 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.


In the Isle Royale archipelago, known from a gravelly point and a wave-washed sandy storm beach. Also found in southern Lower Michigan where relatively little is known of its exact habitat requirements, though it is primarily known from marshes, sloughs, shores, and other open wetland habitats.

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

In southern Michigan, it was noted as occurring with silverweed and sedges. No associate data are available for the northern occurrences.


Protect habitat; maintain wetland hydrology and natural cycle of fluctuations in emergent marsh. Agricultural run-off has negative impacts. Protect habitat from development and invasive species.

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 Aug 18, 2018]

More Information

See MNFI Species Abstract


Survey References

Technical References

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