Golden ragwort, not to be confused with ragweed. (Packera aurea)

AKA golden groundsel, squaw weed, life root, golden Senecio, uncum, uncum root, waw weed, false valerian, cough weed, female regulator, cocash weed, ragweed, staggerwort, and St. James (but not St. John’s) wort.

And you thought it caused allergies.