Overview of the genus Rosa in Michigan

There are numerous species in the genus Rosa naturalized in Michigan, and identification is complicated by extensive hybridization. Roses with the smallest hips are the ones most widely consumed and dispersed by birds, and some are indicated in bold in the following list. While there is variety in the size and shape of seeds, many are similar.

Below are the species most likely to occur in our region.

This key at Michigan Flora lists the following, in addition to Rosa multiflora (Multiflora Rose):
See also identification tips in Mistaken Identity? Invasive Plants and their Native Look-alikes: an Identification Guide for the Mid-Atlantic (PDF) by the New York Botanical Garden.