Hi all, I'm in Oklahoma. This plant is all over my yard, and I'm constantly pulling it out. It only gets about 2 ft tall, the seed capsules are very adhesive, it seems to do fine in both sun and shade, and it's an annual. Descriptions that I've seen of Hemlock say that it's biennial, so I don't think that's what it is. Can anyone tell me what some of the possibilities are, so I can start from there?