Pycnanthemum pilosum
Hairy mountain mint

Key Characteristics

Tall forb (1 m); stems densely pubescent; minty-aromatic leaves sessile and lanceolate, more than 3 times long as wide, pubescent across the entire undersurface; flowers white, borne in dense terminal clusters.

Status and Rank

  • State Status: T
  • State Rank: S2
  • Global Rank: G5T5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Berrien11917
Cass11917
Monroe11922
Saginaw11952
Distribution map for Pycnanthemum pilosum

Updated 7/21/2017. 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.

Habitat

Hairy mountain-mint is known from a shaded river bank as well as upland fields. In the Chicago region it is known from dry hills with prairie associates. Surveys are needed for this species, which has not been documented in Michigan since 1952.

Natural Community Types

Methodology

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

No data are available concerning associates in Michigan.

Management

Status surveys are required to determine if there are extant populations. Management requirements are unknown beyond basic habitat protection and maintenance of the natural disturbance regimes for the habitat.

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 http://mnfi.anr.msu.edu/explorer [Accessed Aug 23, 2017]

References

Survey References

Technical References

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