Asclepias syriaca L.
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 quite variable in color, normally a dusty pinkish, but ranging from a definite purple color to occasionally white or creamy-yellowish. Plants with whitish or cream flowers, 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.



Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Arenac County
    Including Charity Island
Baraga County
Barry County
Bay County
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Berrien County
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    Including Beaver Island
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    Including Drummond Island
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Kalamazoo County
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    Including Fox Islands
    Including Manitou Islands
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    Including Bois Blanc, Mackinac, Round Islands
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Shiawassee County
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Van Buren County
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Wayne County
Wexford County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. September 27, 2022.