Lithospermum officinale L.
Common Name: GROMWELL
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad P-Forb

Lithospermum officinale A. A. Reznicek

A Eurasian introduction, an uncommon weed except in calcareous rocks and gravels around the northern ends of Lakes Michigan and Huron. Edges and openings in forests and thickets, often in rocky and gravelly ground including railroads, roadsides, and shores. Collected in Washtenaw Co. by the First Survey in 1838; next gathered in 1861 on Mackinac Island and still especially frequent in the Straits of Mackinac area.

The nutlets of this species and L. latifolium are generally finely but sparsely pitted.


Alpena County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Delta County
Emmet County
Gladwin County
Leelanau County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Mason County
Menominee County
Schoolcraft County
Tuscola County
Washtenaw County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 7, 2022.