Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
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.