St John's Wort

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St John's wort (Hypericum perforatum) is native to parts of Europe and Asia but has spread worldwide as a cosmopolitan invasive weed, including to temperate regions of India, China, Canada, Africa, and the United States.

Honey bee on St john's Wort, Scaly Mountain, North Carolina USA 2011

The common name "St John's wort" comes from its traditional flowering and harvesting on St John's Day, 24 June. In large doses, St John's wort is poisonous to grazing livestock (cattle, sheep, goats, horses.

https://en.wikipedia.org/wiki/Hypericum_perforatum