Mimulus michiganensis
Michigan monkey flower
Image of Mimulus michiganensis

Photo by Michael R. Penskar 

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Key Characteristics

Prostrate mat-forming forb of calcareous seeps in the Grand Traverse and Mackinac Straits areas; leaves rounded and opposite, with coarsely toothed margins; tubular flowers (15-25 cm) with yellow petals and a red-spotted lower lip.

Status and Rank

  • State Status: E - Endangered (legally protected)
  • US Status: LE - Listed Endangered
  • State Rank: S1 - Critically imperiled
  • Global Rank: G5T1


County NameNumber of OccurrencesYear Last Observed
Distribution map for Mimulus michiganensis

Updated 2/25/2015. 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.


The only plant entirely endemic to Michigan, this monkey-flower is found in cold calcareous springs, seeps, and streams through northern white-cedar as well as at the base of bluffs near the Great Lakes shoreline.

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.

Feel free to send questions and comments to Brad Slaughter at slaugh14@msu.edu.

Associated Plants

Northern white cedar, balsam fir, tag alder, marsh-marigold, watercress, impatiens, jewelweed, and forget-me-not.


This species requires maintenance of cold water source. Prevent disruptions to hydrology, including flow, oxygenation, turbidity.

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 Nov 25, 2015]

More Information

See MNFI Species Abstract


Survey References

Technical References