Mimulus michiganensis
Michigan monkey flower

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
Map Distribution Alcona Alger Allegan Alpena Antrim Arenac Baraga Barry Bay Benzie Berrien Branch Calhoun Cass Charlevoix Cheboygan Chippewa Clare Clinton Crawford Delta Dickinson Eaton Emmet Genesee Gladwin Gogebic Grand_Traverse Gratiot Hillsdale Houghton Huron Ingham Ionia Iosco Iron Isabella Jackson Kalamazoo Kalkaska Kent Keweenaw Lake Lapeer Leelanau Lenawee Livingston Luce Mackinac Macomb Manistee Marquette Mason Mecosta Menominee Midland Missaukee Monroe Montcalm Montmorency Muskegon Oakland Oceana Ogemaw Ontonagon Osceola Oscoda Otsego Ottawa Presque_Isle Roscommon Saginaw St__Clair St__Joseph Sanilac Schoolcraft Shiawassee Tuscola Van_Buren Washtenaw Wayne Wexford

Updated 4/16/2014. 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

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 Aug 31, 2014]

More Information

See MNFI Species Abstract


Survey References

Technical References