Pinguicula vulgaris
Butterwort
Image of Pinguicula vulgaris

Photo by Susan R. Crispin 

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Key Characteristics

Small forb of northern fens and calcareous rocky shorelines; leaves distinctively yellow and forming a basal rosette; flower blue-violet borne singly on a tall stalk (10 cm).

Status and Rank

  • State Status: SC
  • State Rank: S3
  • Global Rank: G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Alger101991
Alpena21981
Charlevoix42015
Chippewa32011
Delta21990
Emmet42010
Houghton11994
Keweenaw242014
Mackinac172016
Marquette12000
Presque Isle32010
Distribution map for Pinguicula vulgaris

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

Butterwort is found in wet depressions within dunes along Great Lakes shorelines, along cobbly-marly shores and marly fens (especially in eastern Upper Peninsula), as well as on alkaline bedrock (conglomerate and basalt) shores of western Upper Peninsula.

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.

Feel free to send questions and comments to Brad Slaughter at slaugh14@msu.edu.

Associated Plants

Arkansas mint, Houghton's goldenrod, hardstem and softstem bulrush, sundew, Ohio goldenrod, Kalm's lobelia, and spikemoss (Selaginella eclipes).

Management

Butterwort is vulnerable to foot traffic and ORVs. Where it occurs in wetlands, protection of hydrology is also important.

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 Apr 27, 2017]

More Information

See MNFI Species Abstract

References

Survey References

Technical References

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