Carya ovata (Mill.) K. Koch
Coefficient of Conservatism: 5
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt Tree

Usually in dry upland forests, with oaks, but sometimes in lowland forests. The Benzie Co. record is of plants seeding in from planted trees; the origin of the Round Island tree, from the "high beach," is uncertain, but probably not a native occurrence. The only mainland Upper Peninsula record, from Delta Co., collected by J. J. Durbin and D. McNamee in 2007, however, appears to be a natural occurrence.

Carya ovata is very variable, particularly in size of fruit and in amount of pubescence on leaves and young twigs. The characteristic subapical tufts of hairs on the teeth of the leaflets are distinctive in this species; if searching on an old worn leaf in the fall reveals one or two teeth bearing a tuft the identification is positive. Very rarely there may be 7 leaflets rather than the usual 5.

The large loose elongate plates of bark characteristic of this species (and C. laciniosa) are best developed on older trees. Young trees may have smooth tight bark (as on one 1–2 dm in diameter, bearing large fruit, discovered by E. E. Sherff in Barry Co.). The husks may be slightly ridged along the sutures, but not so prominently as in bitternut.


Allegan County
Arenac County
Barry County
Benzie County
Berrien County
Calhoun County
Cass County
Clinton County
Delta County
Genesee County
Gratiot County
Hillsdale County
Ingham County
Ionia County
Isabella County
Jackson County
Kalamazoo County
Kent County
Lapeer County
Lenawee County
Livingston County
Mackinac County
    Only on Bois Blanc, Mackinac, Round Islands
Midland County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Ottawa County
Saginaw County
Sanilac County
Shiawassee County
St. Clair County
St. Joseph County
Van Buren County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 30, 2022.