Just remembered...........I once DID make a dried plant arrangement. It was quite large and I used wild pampas grass [from the side of roads], cattails [also from the side of the road. Sprayed them with regular aerosol hairspray to prevent them from bursting], and some errr, dried dark brown 'stuff' that was growing in all the cornfields around here]. It came out quite fetching, actually.
"Where am I going and what am I doing in this handbasket?"