Now that I click on this thread again, I'd say it's definitely a Gerbera. The stem will be thick, but not hard. It'll be something like a tube, as thick as, or thicker than a milkshake straw (the thick straws), in fact, back at my old work of nearly 6 years, Conroy's Flowers, we'd sometimes put the stems inside of thick straws to keep them standing up tall in the arrangements. There won't be any jagged bends in the stem and there won't be any other stems that branch from it. It won't be woody, either. It'll be a very uniform and even tube about 1/4"-1/2" in diameter.
If you ever have some droopy ones, you can lay the whole flower in a sink (bucket, basin, whatever) full of water (with the flower head in the water) and they'll liven up and become firm and strong again.