Rumex obtusifolius L.
Common Name: BITTER DOCK
Coefficient of Conservatism: *
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Ad P-Forb

A native of Europe, found in disturbed, usually moist ground on floodplains, along logging roads and borders of forests, in clearings and fields, around buildings. Known in Michigan since gathered by the First Survey in 1838 in Washtenaw Co. Material too young for the inner tepals to have enlarged and developed teeth may generally be placed by the fact that this is our only species of Rumex in which the leaf blades, at least the lower ones, are broadly and definitely subcordate to cordate and the inflorescence is dense. Hybrids with R. crispus are known (see under that species). The young leaves of all our docks can be eaten as greens, but this one becomes bitter early in the season.

Locations

Alcona County
Alger County
Alpena County
Antrim County
Baraga County
Barry County
Bay County
Benzie County
Berrien County
Calhoun County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Crawford County
Emmet County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Ingham County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
    Including Isle Royale
Lake County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Lenawee County
Luce County
Mackinac County
Macomb County
Manistee County
Marquette County
Mason County
Mecosta County
Midland County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ontonagon County
Ottawa County
Presque Isle County
Schoolcraft County
St. Clair County
St. Joseph 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. December 13, 2017. http://www.michiganflora.net/species.aspx?id=2307.