Spiranthes lacera (Raf.) Raf.
Common Name: SLENDER LADIES'-TRESSES
Coefficient of Conservatism: 8
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt P-Forb

Spiranthes lacera var. lacera A. Strouse var. lacera

Characteristic of dry sandy soil of jack pine plains, often with blueberry and bracken; also under red pine and oak, in moist aspen forests and conifer thickets along shores and dunes, and in thin soil on rocks in the western Upper Peninsula; rarely in moist places.

The common plant in Michigan is var. lacera, with spikes loosely flowered and leaves present at anthesis; var. gracilis (Bigelow) Luer has the flowers densely arranged in the spike, and leaves usually absent at flowering time. Variety gracilis is rare in the southern half of the Lower Peninsula, and flowers later, from mid-August to early September, whereas S. lacera var. lacera blooms from mid-July to mid-August.

Locations

Alger County
Arenac County
Baraga County
Benzie County
Calhoun County
Cass County
Charlevoix County
    Only on Beaver Island
Cheboygan County
Chippewa County
Crawford County
Delta County
Emmet County
Genesee County
Gogebic County
Grand Traverse County
Gratiot County
Houghton County
Iosco County
Iron County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
    Only on Isle Royale
Leelanau County
    Including Manitou Islands
Lenawee County
Luce County
Mackinac County
Macomb County
Marquette County
Mason County
Menominee County
Missaukee County
Muskegon County
Oceana County
Ontonagon County
Oscoda County
Otsego County
Presque Isle County
Roscommon County
Schoolcraft County
St. Clair County
Washtenaw County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 15, 2017. http://www.michiganflora.net/species.aspx?id=1841.