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Ammophila breviligulata Fernald
Coefficient of Conservatism: 10
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt P-Grass

Ammophila breviligulata A. A. Reznicek

Common to abundant on the sandy shores and dunes of Lakes Michigan, Huron, and Superior. May occur a short distance inland, especially near Lake Michigan, on older dunes and blowouts.

The only truly inland occurrence, entirely divorced from the modern Great Lakes, is on the University of Michigan Biological Station grounds on the southeast shore of Douglas Lake, Cheboygan Co. (first collected by J. H. Ehlers 7277 in 1920, MICH – and observed as recently as 2018). Its occurrence there is a modest mystery, though Solidago houghtonii, also long known from the same locality, was noted as having been planted there in 1935. Some other somewhat inland occurrences, e.g., in Muskegon Co., have spread from plantings to stabilize bare sand.  

Observations on A. breviligulata at the Sleeping Bear Dunes, Leelanau Co., by F. C. Gates showed that the rhizomes may grow as much as 2.4 m in a single year as sand accumulates. In possessing both vertical and horizontal rhizomes, this plant is unusually well adapted for survival on sand dunes.

×Calammophila don-hensonii Reznicek & Judz. is a hybrid with Calamagrostis canadensis known from Lake Superior. See Delisle-Oldham, Oldham, & Catling (2008) for a morphological analysis of non-maritime Ammophila populations.


Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Arenac County
Bay County
Benzie County
Berrien County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
Delta County
Emmet County
Grand Traverse County
Houghton County
Huron County
Iosco County
Keweenaw County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Manistee County
Marquette County
Mason County
Muskegon County
Oceana County
Ontonagon County
Ottawa County
Presque Isle County
Schoolcraft County
St. Clair County
Van Buren County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 28, 2023.