Pinguicula vulgaris L.
Common Name: BUTTERWORT
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb
Status: SC

This is a circumpolar boreal species, ranging southward in North America to the northern United States. Other species occur in the southern states and Mexico. Pinguicula vulgaris is a distinct calciphile, growing on alkaline rocks, especially on the Lake Superior shore, and sands (as on interdunal flats and hollows), and marly flats along the Great Lakes; occasionally in marly fens and on moist rock outcrops inland from the Great Lakes, although most sites in Michigan are along the cool shores.

The rather bright-looking rosettes of leaves are very distinctive, and almost always are found near Primula mistassinica (although the primrose also grows many places where butterwort does not). The flowers are solitary on scapes 1.5–12 (–15) cm tall and there may be as many as 9 scapes from a single rosette of leaves.

Locations

Alger County
Alpena County
Charlevoix County
    Only on Beaver Island
Chippewa County
Delta County
Emmet County
Houghton County
Keweenaw County
    Including Isle Royale
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Presque Isle County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 18, 2017. http://www.michiganflora.net/species.aspx?id=1613.