Growing on a patch of concrete in the city. White daisy/aster like flowers. Is this an escaped ornamental?
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.. (or Eurybia divaricata), as the petals are too dense, and the stems are too green.
On the other hand, it doesn't look like a garden escape, as (with due respect) it's not particularly pretty!
Could be as simple as "Wild Aster"?
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I would agree with Aster agg. I am not aware of "Wild Aster" as a species. As stated, Michaelmas-daisies are very difficult and not do-able from a photo. It looks typical of a garden Michaelmas-daisy.
It's not Aster linosyris, or Aster tripolium, which are the native species.
Aster x salignus has gone wild in my neck of the woods, and can be quite weedy. This is generally blue-flowered. Aster lanceolatus also turns up, but tends to grow in spreading colonies. The plants that you find in the wild are rarely up to the standard of the cultivars.
Thanks all for the comments.
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