Thank you Melanie for the links for frogfruit and bidens. I did find that Oklahoma seller during my search for frogfruit.
But all this talk about bidens sticking to everything is making me have second thoughts. haha... really I know most people consider it a weed but it is so valuable as a food source for so many other creatures that I think it's worth growing plus I have plenty of room to plant some far enough away from the house. Actually, anything is better than the Bermuda grass that has taken over my cottage garden!