Dixiegirl wrote:
Thanks so much for the wealth of information, Mike! I'm going to have to do a search on Bidens cernua, and you're so right about the Bidens pilosa. It grows in many places by the roadside, and the people who maintain the pitcher plant bog evidently are trying to keep it from overtaking the bog, because they use a mower on it before it has chance to seed. I don't think I'll be planting it in my yard.
These two species are more common in the South, and are pretty showy.
Those two occur up here, too. Maybe I will give them a try. They like it wet.