Ostrya virginiana (Mill.) K. Koch
Common Name: IRONWOOD, HOP-HORNBEAM
Coefficient of Conservatism: 5
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt Tree

A characteristic small tree of deciduous forests (oak, hemlock-hardwoods, and especially beech-maple). The largest tree in the state is 9 dm in diameter, but most are much more slender.

Sometimes (especially formerly) called Leverwood, from the hardness and strength of the wood. The foliage resembles that of yellow birch (Betula alleghaniensis), but, as in Carpinus, the leaves are always single, not in pairs, while in B. alleghaniensis the leaves on very short lateral shoots (not new branchlets) are generally paired. The stigmas tend to be more delicate and elongate and less brightly colored than those of Carpinus or Corylus. The nutlets are basically in pairs, but each is surrounded by a sac (enlarged and modified from the tiny floral bract); the single true subtending bract is deciduous.

Locations

Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Baraga County
Barry County
Benzie County
Berrien County
Calhoun County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Clare County
Clinton County
Crawford County
Dickinson County
Eaton County
Emmet County
Genesee County
Gladwin County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Huron County
Ingham County
Ionia County
Iosco County
Iron County
Isabella County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
    Including Isle Royale
Lake County
Lapeer County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Lenawee County
Livingston County
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Manistee County
Marquette County
Mason County
Mecosta County
Menominee County
Midland County
Monroe County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ogemaw County
Ontonagon County
Osceola County
Oscoda County
Otsego County
Ottawa County
Presque Isle County
Saginaw County
Sanilac County
Schoolcraft County
Shiawassee County
St. Clair County
St. Joseph 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. December 14, 2017. http://michiganflora.net/species.aspx?id=558.