Dennstaedtia punctilobula
Hay-scented fern
Image of Dennstaedtia punctilobula

Photo by Emmet J. Judziewicz 

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Key Characteristics

Tall lacy fern (30-80 cm) of disturbed habitats, very aromatic; spores borne in cup-like membrane.

Status and Rank

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

Occurrences

County NameNumber of OccurrencesYear Last Observed
Jackson12010
Shiawassee11889
Distribution map for Dennstaedtia punctilobula

Updated 1/31/2017. 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

This species is known from an old collection "near Owosso" that provided virtually no habitat data. It was also recently discovered in a dry forest in southeast Michigan. Elsewhere, this species occurs in full sun to partial shade and moderately to strongly acid soil, and occasionally it occurs on outcrops.

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

Protection of the one currently known site is critical. The species may also benefit from prescribed fire based on its prevalence in fire-dependent habitat elsewhere.

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 May 23, 2017]

References

Survey References

Technical References

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