Calypso bulbosa (L.) Oakes
Common Name: CALYPSO, FAIRY-SLIPPER
Coefficient of Conservatism: 10
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Forb
Status: T

Mixed moist forests of conifers and hardwoods (e.g., balsam fir and paper birch) or, more often, mostly coniferous forests (balsam fir and cedar, spruce and balsam fir, hemlock), especially characteristic of old beach ridges under conifers near the shores of the Great Lakes; usually more or less shaded.

This is one of our most beautiful wildflowers, very local in occurrence (colonies of hundreds, as on Isle Royale, a truly handsome sight!). It deserves all of the protection which can be given to it (and the places where it grows). The sepals and upper petals are normally pink or magenta, but occasionally pure white or apricot; the lip is strongly lined with deep purplish, spotted toward the white (rarely pink) “apron,” which bears a yellow beard apically. Almost all records in the Lower Peninsula away from the Great Lakes shores are historical.

Our eastern North American plants are var. americana (R.Br.) Luer.

Locations

Alcona County
Alger County
Alpena County
Antrim County
Benzie County
Charlevoix County
    Only on Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Crawford County
Delta County
Emmet County
Isabella County
Keweenaw County
    Including Isle Royale
Leelanau County
    Only on Fox Islands
    Including Manitou Islands
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Montmorency County
Ontonagon County
Otsego County
Presque Isle County
Roscommon County
Schoolcraft County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 17, 2017. http://www.michiganflora.net/species.aspx?id=1797.