Hypericum boreale (Britt.) E. P. Bicknell
Common Name: NORTHERN ST. JOHN'S-WORT
Coefficient of Conservatism: 5
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

Bogs, marshy ground, moist sandy to mucky shores and interdunal hollows.

The broadly elliptic-rounded, nearly clasping leaves of this species may suggest a small version of Triadenum. Submersed stems may exhibit long internodes and small 3-nerved (but not punctate) rounded leaves [f. callitrichoides Fassett]; identification can usually be confirmed by association with fertile plants on an adjacent shore.

Locations

Alger County
Allegan County
Baraga County
Benzie County
Berrien County
Calhoun County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
Clare County
Crawford County
Delta County
Gladwin County
Gogebic County
Houghton County
Iron County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
    Including Isle Royale
Lake County
Lenawee County
Luce County
Mackinac County
Manistee County
Marquette County
Mecosta County
Missaukee County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ontonagon County
Ottawa County
Presque Isle County
Roscommon County
Schoolcraft 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 15, 2017. http://www.michiganflora.net/species.aspx?id=1458.