Common Name:
NORTHERN ST. JOHN'S-WORT
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Coefficient of Conservatism:
5
Coefficient of Wetness:
-5
Wetness Index:
OBL
Physiognomy:
Nt P-Forb
G. E. Crow
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 develop into an aquatic form, and 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
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Alger County
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Allegan County
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Baraga County
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Benzie County
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Berrien County
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Calhoun County
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Cass County
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Charlevoix County
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Including Beaver Island
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Cheboygan County
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Chippewa County
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Clare County
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Crawford County
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Delta County
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Gladwin County
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Gogebic County
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Grand Traverse County
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Houghton County
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Iron County
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Kalamazoo County
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Kalkaska County
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Kent County
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Keweenaw County
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Including Isle Royale
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Lake County
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Lenawee County
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Luce County
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Mackinac County
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Manistee County
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Marquette County
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Mecosta County
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Missaukee County
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Muskegon County
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Newaygo County
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Oakland County
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Oceana County
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Ontonagon County
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Ottawa County
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Presque Isle County
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Roscommon County
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Schoolcraft County
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St. Joseph County
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Van Buren County
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Washtenaw County
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Wayne County
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Wexford County
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Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 29, 2020. https://michiganflora.net/species.aspx?id=1458.