Plant id - Common Pioneer

I can't find this plant on the internet. It's slowly taking over the field. In the fall it sets black seed pods with 2 pronged stickers. Sorry for the pic, it's kinda bad. Leaves are serrated.

Thanks,
William

We call it tickweed. I asked the same question once. We had never had it before and suddenly one year it appeared. Those little seeds are an effective method of spreading and a real stinker to get rid of once the children are coated in them.

@Matu - Thanks for that. We cut wide swaths through it to avoid touching it with our jackets. Why can't it come in mid summer when you're wearing a t-shirt and shorts?
I'm checking the other threads on this plant.

Anyone else have a name for this plant? Can't find anything relating to tickweed, so I think that's a no-go. Someone in another thread said 'toxic water hemlock' (Cicuta) but that's not it.

William

I found this on Tickweed http://www.thefreedictionary.com/tickweed. I hope it helps.

It is also called beggarticks, Bidens is the genus name.

Here is the thread where I asked.

[re-posting here for continuity]

Here are three distinct products made from Beggartick.

http://www.ebay.com/itm/Bur-Marigold-Oil-Diathesis-Neurodermatitis-Skin-Rashes-Baby-Bath-Brittle-Hair-/320925142039?pt=US_Dietary_Supplements_Nutrition&hash=item4ab8a10c17

http://www.ebay.com/itm/Bur-Marigold-Anti-allergic-Various-Skin-Diseases-Diathesis-Baby-bath-40gr-/271609532270?pt=US_Dietary_Supplements_Nutrition&hash=item3f3d308f6e

http://www.ebay.com/itm/Bur-Marigold-Day-Herbal-Cream-anti-inflammatory-for-Irritated-Skin-44ml-1-55oz-/270991010037?pt=US_Dietary_Supplements_Nutrition&hash=item3f1852a8f5