Climbing prairie rose (Rosa setigera) COSEWIC assessment and status report addendum: chapter 7

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Distribution

• Global range
• Canadian range

Global range

The range of this species is mainly through the central United States, with a small area in adjacent Canada (Figure 2). In the south, it ranges from the western foothills of the Appalachian Mountains, through the Mississippi valley, to eastern Texas. In the north, it reaches southern Michigan and adjacent Ontario, with outlying areas of New York, Pennsylvania and small isolated populations east of the Appalachian Mountains; the latter likely represent introductions from cultivation (Lewis, 1958). Maps are given for the species in the original status report (Ambrose, 1986). These are reproduced by Keddy (1984) and on the Royal Ontario Museum/ Ontario Ministry of Natural Resources (ROM/OMNR) website with some updates in localities as given in this update report.

Figure 2. North American range of Climbing Prairie Rose (Rosa setigera)

Based on Lewis 1958.

Canadian range

In Canada it occurs in extreme southwestern Ontario (Figure 3) with records in Essex County (Amherstburg, Malden, Pelee Island and Tilbury) known since the late 1800s (Macoun, 1883-6). The natural areas within the boundaries of the Essex Region Conservation Authority were thoroughly surveyed and reported by Oldham (1983). It is also known in the adjacent Chatham-Kent Region and Lambton County, and recently just over the county line in Middlesex. One disjunct collection was made in Prince Edward County in 1944 but has not been recently verified.

Figure 3. Distribution of Rosa setigera in Canada.

Each dot corresponds to a site. Hollow circles represent extirpated sites from Table 1, solid circles represent extant sites from Table 1 and presumed extant sites not surveyed in 2000-01.