Asclepias syriaca L.
Common Name: COMMON MILKWEED
Coefficient of Conservatism: 1
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt P-Forb

Dry to somewhat moist, usually sandy, often ± disturbed areas: roadsides and railroads, shores and dunes, fields,; openings in aspen and pine savannas.

The flowers are occasionally whitish or cream, and such plants, especially if they have unusually small flowers, might key to A. ovalifolia, but that species is much more delicate in stature. Flowers in the large umbels sometimes shrivel in drying so that they appear to be less than 10.5 mm long, but well-pressed flowers can usually be found at least that long.

The follicles (“pods”) are occasionally smooth (as in A. purpurascens), but usually are ± prominently warty or tuberculate.

Hybridizes with A. speciosa and rarely with A. exaltata and A. purpurascens.

The name "syriaca" is a misnomer; the species is a North American native, not from Syria.

 

Locations

Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Arenac County
    Including Charity Island
Baraga County
Barry County
Bay County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Clare County
Clinton County
Crawford County
Delta County
Dickinson County
Eaton County
Emmet County
Genesee County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Huron County
Ingham County
Ionia County
Iosco County
Iron County
Isabella County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
Lake County
Lapeer County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Lenawee County
Livingston County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Manistee County
Marquette County
Mason County
Mecosta County
Menominee County
Midland County
Missaukee County
Monroe County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ontonagon County
Oscoda County
Otsego County
Ottawa County
Presque Isle County
Roscommon County
Saginaw County
Sanilac County
Schoolcraft County
Shiawassee County
St. Clair County
Tuscola County
Van Buren County
Washtenaw County
Wayne County
Wexford County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. September 26, 2017. http://www.michiganflora.net/species.aspx?id=162.