Lathyrus japonicus Willd.
Common Name: BEACH PEA
Coefficient of Conservatism: 10
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt P-Vine

Lathyrus japonicus B. S. Walters

Dunes, sandy or even gravelly beaches (rarely rock crevices), and adjacent disturbed ground (or relic on old dune ridges) along the Great Lakes.

Though known very sparingly from large inland lakes and along large rivers in the northeast, our only inland collection is from Higgins Lake, presumably the north end in Crawford Co., by one of the Government surveyors in 1849 (G. H. Cannon, MSC). This is a circumpolar species, found on shores of the oceans and some of the largest inland lakes, including all five Great Lakes. White-flowered forms occur rarely.


Alcona County
Alger County
Allegan County
Antrim County
Arenac County
    Including Charity Island
Baraga County
Benzie County
Berrien County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
Crawford County
Delta County
Emmet County
Gogebic County
Grand Traverse County
Houghton County
Iosco County
Kalamazoo County
Keweenaw County
    Including Isle Royale
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Manistee County
Marquette County
Mason County
Menominee County
Muskegon County
Oceana County
Ontonagon County
Ottawa County
Presque Isle County
Schoolcraft County
St. Clair County
Van Buren County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 22, 2022.