Mimulus guttatus
Western monkey flower
Image of Mimulus guttatus

Photo by Susan R. Crispin 

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Key Characteristics

Small erect forb of calcareous seeps in the western Upper Peninsula; leaves rounded and opposite, with coarsely toothed margins; tubular flowers (15-45 cm) with yellow petals and a strongly spotted floral tube.

Status and Rank

  • State Status: SC
  • State Rank: S1
  • Global Rank: G5


County NameNumber of OccurrencesYear Last Observed
Distribution map for Mimulus guttatus

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.


This species is found in and along cold, calcium-rich springs, seeps, and streams.

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

Northern white cedar, pussy willow, satiny willow, royal fern, false strawberry, water-horehound, jewel weed, marsh-marigold, swamp saxifrage, and woodland horsetail.


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 Jul 20, 2018]


Survey References

Technical References

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