Platanthera hookeri (A. Gray) Lindl.
Common Name: HOOKER'S ORCHID
Synonym: Habenaria hookeri
Coefficient of Conservatism: 8
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt P-Forb

Habenaria hookeri of Michigan Flora.

Coniferous or mixed forests, thickets, and borders, especially on forested dunes and sandy soil near the Great Lakes; less often in deciduous forest or hemlock-hardwoods.

Rarely a specimen occurs with one or both of the leaves about twice as long as broad, although the leaves are usually almost as orbicular as those of P. orbiculata. Fully developed spurs are 16–24 (–26) mm long, directed downward. This species blooms as much as two or three weeks earlier than P. orbiculata or P. macrophylla when found in the same area. Recent collections are few, none from southern Michigan.

Locations

Alger County
Benzie County
Berrien County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Dickinson County
Emmet County
Grand Traverse County
Gratiot County
Hillsdale County
Ingham County
Ionia County
Jackson County
Keweenaw County
    Including Isle Royale
Leelanau County
Luce County
Mackinac County
Marquette County
Menominee County
Midland County
Muskegon County
Presque Isle County
St. Clair County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 18, 2017. http://www.michiganflora.net/species.aspx?id=1830.