Juniperus horizontalis Moench
Common Name: CREEPING JUNIPER
Coefficient of Conservatism: 10
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt Shrub

Juniperus horizontalis habitat B. S. Walters habitat

On rock at Isle Royale and in Dickinson, Marquette, and Keweenaw Cos. (including a very blue-glaucous form on Mt. Bohemia) and on dolomite pavement on Summer Island (Delta Co.) and Drummond Island (Chippewa Co.); elsewhere almost entirely confined to the sandy or gravelly shores and dunes of the Great Lakes, usually associated with pine and the common juniper, and relic on older shores and beach ridges among cedar and fir thickets; rare in peatlands in the Upper Peninsula. 

Often cultivated, and some southern collections on roadsides and near buildings inland from the Great Lakes shores are not mapped as they were presumably planted. This includes specimens from Crawford, Ogemaw, Oscoda, and Van Buren Cos. The somewhat disjunct occurrence in Tuscola Co. is from an open beach ridge of Lake Huron and is apparently native.  

Locations

Alcona County
Alger County
Alpena County
Antrim County
Benzie County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Delta County
Dickinson County
Emmet County
Grand Traverse County
Iosco County
Keweenaw County
    Including Isle Royale
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Menominee County
Ontonagon County
Presque Isle County
Schoolcraft County
Tuscola County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 11, 2017. http://www.michiganflora.net/species.aspx?id=888.