In today's entry, I've followed USDA and other authors and called this Bidens alba. Flora of North America combines the white species as B. pilosa. If you do that then you have to admit it has hitched to a lot more places; AZ, CA, KY, OH, OR, SC, TX, WI, ON, and QC. One or both are also in Mexico, Central America, and now Europe. Indians ate the young leaves as fresh or cooked vegetables.