Symphyotrichum firmum (Nees) G. L. Nesom
Common Name: SMOOTH SWAMP ASTER
Synonym: Aster puniceus
Coefficient of Conservatism: 4
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Forb

Symphyotrichum firmum A. A. Reznicek

Included in Aster puniceus in Michigan Flora.

Sedge meadows, openings in swamps, wet shrub swamps, river and stream banks, lake shores, moist fields, ditches, wet roadsides, less commonly in drier fields.

We follow Warners & Laughlin (1999) in separating S. puniceum and S. firmum, though any single character may show overlap. Symphyotrichum firmum tends to form large showy colonies from extensive long-creeping rhizomes and is often conspicuous in open ground as along wet roadsides, and even in somewhat drier settings. The stem is glabrous or glabrate below, with the upper internodes glabrous or with pubescence uneven (in narrow stripes or lines) and the internodes are shorter, giving a very compact and leafy appearance to the top of the plant. Some unusually pubescent specimens may be easily separable in the herbarium only if basal parts are present. Usually, the flowers are paler, often nearly white, than the rich blue of S. puniceum.

Locations

Alger County
Allegan County
Alpena County
Baraga County
Barry County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Charlevoix County
Cheboygan County
Chippewa County
Clinton County
Delta County
Dickinson County
Emmet County
Genesee County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Ingham County
Ionia County
Iosco County
Isabella County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
Lake County
Lapeer County
Leelanau County
Lenawee County
Livingston County
Luce County
Mackinac County
Macomb County
Manistee County
Marquette County
Mecosta County
Menominee County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Ontonagon County
Osceola County
Sanilac County
Schoolcraft County
Shiawassee County
St. Clair County
St. Joseph County
Van Buren County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 11, 2017. http://michiganflora.net/species.aspx?id=483.