Spiranthes casei Catling & Cruise
Synonym: Spiranthes cernua
Coefficient of Conservatism: 8
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt P-Forb

Fields and savannas in moist to dry sandy, acid soils, often with bracken and Danthonia spicata. More northern than S. ochroleuca, and blooming earlier, from early August to early September.

Named for Frederick W. Case, Jr. (1927-2011), student of Great Lakes Orchidaceae, Trilliums, and well known gardener. 

The Spiranthes cernua complex (S. casei, S. cernua, S. magnicamporum, and S. ochroleuca) has been greatly clarified since the publication of Michigan Flora, though recognition of four species makes identification difficult. Fortunately, these species are somewhat separated both ecologically and geographically, and determination of plants is easier in the field than in the herbarium. For more information, see Case & Catling (1983) and Case (1987). This species was called S. vernalis in Michigan Flora, a more southern species not yet confirmed for Michigan.


Alger County
Alpena County
Cheboygan County
Crawford County
Delta County
Emmet County
Genesee County
Gogebic County
Houghton County
Isabella County
Kalkaska County
Keweenaw County
Luce County
Marquette County
Missaukee County
Montmorency County
Newaygo County
Ontonagon County
Otsego County
Presque Isle County
Saginaw County
Schoolcraft County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. April 22, 2021. https://michiganflora.net/species.aspx?id=1839.