Prunella vulgaris L.
Common Name: SELF-HEAL, HEAL-ALL
Coefficient of Conservatism: 0
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt P-Forb

Grows in almost every sort of moist or dry, disturbed or undisturbed area, including upland forests as well as swamps (hardwoods, cedar, tamarack), especially along borders and trails (and old logging roads), in clearings, and after logging; roadsides, parking lots, campgrounds, recreation areas; fields and meadows, along rivers and streams, in fens; on rocky outcrops including limestone pavements. Native in Eurasia and also in North America, although some thoroughly established weedy variants are presumably introduced.

Some strains have a creeping habit that appears adapted to a lawn environment. While stems of such plants may be only a few cm tall when flowering, on favorable sites plants may be 0.5 m tall. Unlike most mints, Prunella is not aromatic, but long ago it had reputed medicinal properties. It is too aggressive to be popular in most gardens.

The corolla is normally blue-violet (or even pinkish), but white-flowered plants [f. albiflora Britton] are occasional throughout the state. The middle lobe of the lower lip is fringed. Blephilia ciliata might be superficially confused with Prunella because of the broad, conspicuous floral bracts, but that species has entire corolla lobes, 2 stamens, all 5 calyx lobes well developed and more densely ciliate, and paler flowers.

Locations

Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Arenac County
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
Gogebic 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
    Including Isle Royale
Lake County
Lapeer County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Lenawee County
Livingston County
Luce 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
Ogemaw County
Ontonagon County
Osceola County
Oscoda County
Ottawa County
Presque Isle County
Roscommon County
Saginaw County
Sanilac County
Schoolcraft County
St. Clair County
St. Joseph 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. December 11, 2017. http://michiganflora.net/species.aspx?id=1580.