Erigeron bonariensis vs canadensis vs sumatrensis

https://www.inaturalist.org/journal/blue_celery/40104-erigeron-bonariensis-vs-canadensis-vs-sumatrensis

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It would be really helpful to embed some photos which illustrate what to look for.

e.g. ![ .](https://static.inaturalist.org/photos/50216450/original.jpg?1567501098)

Just the thing I need at this time of year!