Pycnanthemum muticum
Mountain mint

Key Characteristics

Tall forb (1 m) of moist shores and meadows; stems densely pubescent; minty-aromatic leaves sessile and oblong, less than 3 times long as wide; flowers white, borne in dense terminal clusters.

Status and Rank

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


County NameNumber of OccurrencesYear Last Observed
Distribution map for Pycnanthemum muticum

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.


Limited habitat data indicate that this species occurs in fen-like habitat. In the Chicago region, it occurs in moist calcareous soils.

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

Swamp goldenrod, boneset, swamp thistle, marsh fern, skullcap, and joe-pye weed.


A status survey is recommended to compile more thorough information on habitat requirements. The species would likely benefit from the maintenance of hydrology and activities that promote open conditions such as prescribed burning and brush control.

General Survey Guidelines

Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgment of the investigator.

Survey Methods

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at [Accessed Jul 20, 2018]


Survey References

Technical References

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