i recently googled ''ragweed,'' wondering what it looked like since i wasn't familiar with it, and i ran into an acquaintance who had experienced a terrible allergy attack several weeks ago. she said it was due to ragweed pollen in the air.
so i found photos that noted ragweed as this, but tonight, i realized it's commonly confused for ragweed but is wild goldenrod. i have some goldenrod from a perennial nursery, and it does of course look similar. but these yellow sprigs are all around right now, seeding on their own in let-go landscapes.