Photo by Susan R. Crispin
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
|County Name||Number of Occurrences||Year Last Observed|
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.
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
- Limestone cobble shore
- Limestone bedrock lakeshore
- Volcanic bedrock lakeshore
- Sandstone lakeshore cliff
- Interdunal wetland
- Coastal fen
- Wooded dune and swale complex
- Sand and gravel beach
- Volcanic lakeshore cliff
- Northern fen
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.
Arkansas mint, Houghton's goldenrod, hardstem and softstem bulrush, sundew, Ohio goldenrod, Kalm's lobelia, and spikemoss (Selaginella eclipes).
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.
- Meander search
Survey Period: From first week of June to fourth week of August
More InformationSee MNFI Species Abstract
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- Gleason, H. A., and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second edition. The New York Botanical Garden, Bronx. 910pp.
- Gray, A. 1950. Gray's Manual of Botany; eighth ed. Van Nostrand Reinghold, New York. 1632pp.
- Holmgren, N.H. 1998. Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the vascular plants of Northeastern United States and adjacent Canada. New York Botanical Garden, Bronx. 937pp.
- Scoggan, H.J. 1978. The Flora of Canada. National Museum of Natural Science Publications Botany 4: 1711pp.
- Voss, E.G. 1996. Michigan Flora. Part III. Dicots (Pyrolaceae-Compositae). Bulletin of the Cranbrook Institute of Science and University of Michigan Herbarium. 622pp.