Rubus occidentalis L.
Common Name: BLACK RASPBERRY
Coefficient of Conservatism: 1
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt Shrub

Fields, thickets, forests (oak, disturbed beech-maple), clearings and borders of forests, fencerows, boggy ground.

Where this species and R. strigosus grow together, presumed hybrids, relatively distinctive by Rubus standards, are sometimes found (R. ×neglectus Peck). They may have the characteristic purple, heavily glaucous, strongly prickly old canes of R. occidentalis, but also the glandular bristles of R. strigosus (these mixed with, and generally shorter than, the stouter and slightly recurved prickles in the inflorescence). The fruit is ± intermediate. Such plants have been collected in Gratiot, Ingham, Isabella, Kent, Lenawee, Monroe, and Wayne Cos.

Unlike Rubus strigosus, R. occidentalis commonly produces very long-arching, often almost vine-like, shoots that root where the tip comes onto contact with the ground.  

Locations

Allegan County
Barry County
Bay County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Cheboygan County
Clinton County
Delta County
Genesee County
Gratiot County
Hillsdale County
Ingham County
Isabella County
Kalamazoo County
Kent County
Lake County
Lapeer County
Leelanau County
    Including Manitou Islands
Lenawee County
Livingston County
Mackinac County
    Only on Bois Blanc, Mackinac, Round Islands
Macomb County
Mason County
Monroe County
Montcalm County
Newaygo County
Oakland County
Ottawa County
Shiawassee County
St. Clair County
St. Joseph County
Tuscola County
Washtenaw County
Wayne County
Wexford County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 15, 2017. http://www.michiganflora.net/species.aspx?id=2559.