Plants and Animals
Eleocharis compressa Flattened spike rush
Perennial mat-forming spike-rush of fens and alvar; culms strongly flattened, arising in a row from a strong rhizome; scales on spikelet reddish brown; achenes golden-brown, with a small brown pyramidal cap.
Status and Rank
US Status: No Status/Not Listed
State Status: T - Threatened (legally protected)
Global Rank: G4 - Apparently secure
State Rank: S2 - Imperiled
|County||Number of Occurrences||Year Last Observed|
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.
Found on limestone pavement in rock crevices and local depressions, primarily on Drummond Island.
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.
Bulrush sedge, Richardson's sedge, prairie smoke, early saxifrage, prairie dropseed, juniper, and big and little bluestem.
This species is sensitive to alterations of hydrology and soil/groundwater pH.
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement of the investigator.
Survey Period: From first week of June to fourth week of August
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