Calypso bulbosa
Calypso or fairy-slipper
Image of Calypso bulbosa

Photo by Susan R. Crispin 

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Key Characteristics

Very small perennial orchid (10-20 cm) of moist coniferous forests with one oval, basal leaf; flower small, pink to purple, with a pouch crested by yellow hairs.

Status and Rank

  • State Status: T
  • State Rank: S2
  • Global Rank: G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Alcona11876
Alger31984
Alpena11908
Antrim11893
Benzie11893
Charlevoix61989
Cheboygan11931
Chippewa141995
Crawford21887
Delta41995
Emmet51985
Gogebic21974
Iron12010
Isabella11892
Keweenaw291994
Leelanau31989
Mackinac172016
Marquette21940
Menominee22005
Montmorency11955
Presque Isle31984
Roscommon11849
Schoolcraft31981
Distribution map for Calypso bulbosa

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

Occurs in spruce-balsam-cedar swamps, moist coniferous forests with cool soils, and Great Lakes shoreline forests dominated by spruce, cedar, fir, and paper birch. It is especially found on calcareous substrates.

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

White cedar, balsam fir, white and black spruce, ram's head orchid, dwarf lake iris, ebony sedge, beauty sedge, Canada mayflower, starflower, gaywings, twinflower, shrubby cinquefoil, blue-bead lily, goldthread, fly honeysuckle, naked miterwort, and kidney-leaved violet.

Management

Likely requires maintenance of an overstory. It is sometimes vulnerable to impacts from photographers. Requires protection of habitat and hydrological regimes.

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 Oct 21, 2017]

More Information

See MNFI Species Abstract

References

Survey References

Technical References

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