Hypericum ascyron L.
Common Name: GIANT ST. JOHN'S-WORT
Coefficient of Conservatism: 8
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt P-Forb

Moist ground along rivers and streams, ditches and wet meadows, borders of marshes and swamps.

This is the tallest of our species of Hypericum, attaining a height of ca. 2 m; it also has by far the largest flowers, capsules, and leaves.

Locations

Baraga County
Benzie County
Berrien County
Branch County
Calhoun County
Charlevoix County
Delta County
Dickinson County
Emmet County
Gogebic County
Gratiot County
Houghton County
Ingham County
Ionia County
Iosco County
Iron County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
Lake County
Lenawee County
Livingston County
Manistee County
Mecosta County
Menominee County
Monroe County
Newaygo County
Oakland County
Ontonagon County
Oscoda County
Otsego County
Ottawa County
Presque Isle County
Roscommon County
Schoolcraft County
St. Clair County
Tuscola County
Van Buren County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 22, 2017. http://michiganflora.net/species.aspx?id=1457.