I've read of so many different weeds referred to as having hitchhiker seeds. If you want some creeping beggarweed, just supply your address and I'll send you plenty.

Hi Pomme,

If you are referring to Cocklebur, we have zillions
of them. It all started with someone or something
dragging it in, and suddenly the darned things
won't go away.

Xanthium pensylvanicum, is this what you seek?

Karen Marie