Just recently I joined the Calgary Horticultural Society. In their current August/September newsletter Ann Van de Reep, garden designer for the Calgary Zoo, wrote an article about this plant, the black henbane. According to her article, "all parts of black henbane are poisonous to humans and animals. Even the smell of the flowers can produce giddiness, dizziness and confusion."
I found this one on the bike path hill above Prince's Island parking lot. I checked the City of Calgary web site and didn't find it on their list of invasive plants to be concerned about, but when I called 311 they said they would look into it.
Links:
Invasive Alien Species: Black Henbane
Notes on poisoning: black henbane
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