Viburnum rafinesquianum Schult.
Common Name: DOWNY ARROWWOOD
Coefficient of Conservatism: 5
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt Shrub

Viburnum rafinesquianum B. S. Walters

Typically in dry sandy or rocky forests with oak, hickory, pine, or other trees, sometimes beech and maple and along associated banks and openings; fencerows; sometimes in swampy ground and thickets along rivers.

Most of our specimens are var. rafinesquianum, with leaf blades ± downy beneath and petioles rather densely pubescent. The glabrate extreme, with leaf blades at most pubescent on the main veins and with the petioles glabrate to sparsely hairy, is var. affine (B. F. Bush) House. This variety is known mainly from the southeastern Lower Peninsula, but ranges as far to the northwest as Ontonagon Co. Intermediates between this variable species and V. dentatum are said to occur where there is more overlap in range. Fortunately we seem to have the glabrate variant of V. dentatum and mostly the pubescent extreme of V. rafinesquianum so there is little difficulty in Michigan distinguishing the two. See also notes about V. acerifolium f. ovatum.

Locations

Alcona County
Allegan County
Alpena County
Barry County
Bay County
Berrien County
Calhoun County
Clare County
Clinton County
Genesee County
Gratiot County
Hillsdale County
Ingham County
Ionia County
Iosco County
Iron County
Isabella County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
Lake County
Lapeer County
Lenawee County
Livingston County
Macomb County
Manistee County
Mecosta County
Menominee County
Montcalm County
Montmorency County
Newaygo County
Oakland County
Oceana County
Ontonagon County
Oscoda County
Ottawa County
Presque Isle County
Shiawassee 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 16, 2017. http://michiganflora.net/species.aspx?id=23.