Tick Trefoil

Thanks for these suggestions - I've looked up the references you both suggested and I'm now sure that it is a Desmodium

Look alike Teramnus labialis small climber plant.

It's a species of Desmodium or Tick Trefoil. They can be really difficult to I.D. at the species level. It will get little bean-like pods covered with tiny bristles that break apart into segments and stick tight to fur or clothing when something brushes against them, which is why they're called tick trefoils. Here's a link that might help: http://www.southeasternflora.com/search....