Willowleaf aster (Symphyotrichum praealtum) COSEWIC status assessment and status report chapter 11
Summary of Status Report
About 12 extant populations exist in Canada; these are restricted to southwestern Ontario, primarily within Windsor and on Walpole Island, where they are at risk from further development and other forms of human activity. As many as 5 historic sites may be extirpated. Habitat destruction is the biggest threat to the populations.
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