Mycelis muralis (L.) Dumort.
Synonym: Lactuca muralis
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad B-Forb

Mycelis muralis A. A. Reznicek

Lactuca muralis of Michigan Flora.

An invader from Europe, locally abundant on calcareous shores, especially on islands, in the Straits of Mackinac area and spreading into cedar swamps and deciduous forests; also on a sandy river bank in Emmet Co. First collected in 1924 on Mackinac Island (Mackinac Co.).

Easily recognized by the large, diffuse panicle of numerous very slender, few-flowered heads and the large, triangular or 3-lobed terminal portion of the pinnatifid leaves.


Alpena County
Chippewa County
Emmet County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Presque Isle County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 22, 2021.