Platanthera ciliaris (L.) Lindl.
Synonym: Habenaria ciliaris
Coefficient of Conservatism: 10
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Forb
Status: E
Platanthera ciliaris A. A. Reznicek

Habenaria ciliaris of Michigan Flora.

Usually in sphagnum bogs. Very rarely in moist acid sandy meadows and savannas, with bracken and a graminoid savanna understory, although more historical records are apparently from this type of habitat.

This is one of the most striking of all our native orchids, with its brilliant orange flowers, as well as one of the rarest. 

In southwestern Michigan, both Platanthera ciliaris and P. blephariglottis may grow together in the same bog, and hybrids, with all intermediates between the two, including lemon-yellow flowers, are known from Allegan, Berrien, and Van Buren Cos. [P. ×bicolor (Raf.) Luer]. See a photo of P×bicolor in front of one illustration of Woodwardia virginica.


Allegan County
Bay County
Berrien County
Calhoun County
Cass County
Ingham County
Jackson County
Kalamazoo County
Kent County
Monroe County
Muskegon County
Oakland County
St. Clair County
St. Joseph County
Van Buren County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 26, 2022.