Picture two landscape workers in the middle of a freeway interchange picking at each other's clothes like monkeys, so we could get back in our truck. The Spanish needle gets taller than me, and I can tell you we had several unprintable names for it. One of my co-workers used to pay her daughter a $ every evening to pick the seeds out of her boot laces.
Sorry this has nothing to do with Desmodium ,but the reference got me remembering those days.