Ceanothus americanus L.
Coefficient of Conservatism: 8
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt Shrub

Dry open sandy plains and prairie-like areas (spreading to roadsides), dry savannas (with oak, aspen, pines); often in openings or transitional areas between lakes or marshes and forests; river banks.

This species blooms much later than C. herbaceus, which will be in young fruit when C. americanus is flowering in any given area and season.

Inflorescences in this species are typically from the uppermost nodes, with a small portion of the shoot or at least a conspicuous hairy bud extending beyond them. Only rarely (perhaps only as an abnormality or in late-season shoots) is there a truly terminal inflorescence, but this is then accompanied by a number of lateral inflorescences, these with long peduncles exceeding the subtending leaves.

With only rare exceptions, the leaf blades are much broader than those of Ceanothus herbaceus. There is also a tendency for the leaves to be more broadly cuneate, or even truncate to subcordate at the base than in C. herbaceus, but this is much more variable and not always definitive.


Allegan County
Alpena County
Barry County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Cheboygan County
Clare County
Clinton County
Crawford County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Huron County
Ingham County
Ionia County
Iosco County
Isabella County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
Lake County
Lapeer County
Leelanau County
Lenawee County
Livingston County
Manistee County
Mason County
Mecosta County
Menominee County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ogemaw County
Ottawa County
Presque Isle County
Roscommon County
Shiawassee County
St. Clair County
St. Joseph County
Van Buren County
Washtenaw County
Wayne County
Wexford County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 26, 2022. https://www.michiganflora.net/species.aspx?id=2408.