Lakeside daisy (Hymenoxys herbacea) COSEWIC assessment and update update status report: chapter 4

Distribution

Global Range

Hymenoxys herbacea is endemic to the Great Lakes region (Morton and Venn, 2000). It is currently known from two sites in the United States -- Marblehead Quarry, Ohio (DeMauro, 1993) and Mackinac County, Michigan (Voss, 1996) and has been extirpated from two additional locations in Illinois (Wunderlin, 1971). Currently there is a project ongoing to recreate three populations in the Illinois area (De Mauro, 1994). In Ohio, H. herbacea has been introduced to Kelleys Island in Lake Erie, where it never historically occurred (Schneider and Windus, 1993). A total of 38 populations is known from two large and less disturbed regions in Canada -- the Bruce Peninsula, Ontario and southern Manitoulin Island, Ontario, each of which consists of several populations (Catling, 1995).

Canadian Range

In Canada, 38 extant and one extirpated H. herbacea populations are known from Manitoulin Island (Figure 2) and the Bruce Peninsula, Ontario (Catling, 1995; Campbell, 2001; Figure 3). This range currently extends from the western-most point on Manitoulin Island, Meldrum Bay, as far east as Cabot Head, Bruce Peninsula, as far north as Meldrum Bay and as far south as the corner of Dyers Bay Road and Highway #6 on the Bruce Peninsula. On Manitoulin Island, the populations tend to be found on the southern shoreline and inland and have not been reported from the northern shoreline (Figure 2). On the Bruce Peninsula, the populations are found on the north-eastern shoreline and inland, but have not been found on the southern shoreline (Figure 3).

Figure 2. Distribution of Hymenoxys herbacea populations on Bruce Peninsula, Ontario.

 Figure 2.  Distribution of Hymenoxys herbacea populations on Bruce Peninsula, Ontario.

Figure 3. Distribution of Hymenoxys herbacea populations on western Manitoulin Island, Ontario.

Figure 3.  Distribution of Hymenoxys herbacea populations on western Manitoulin Island, Ontario.

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