Would someone be kind enough to identify this for me;

http://www.twango.com/media/Muddymik...e.10028?sort=5

I found it rolling around by the gate in the wind a few weeks ago, not in a
pot but with a perfect rootball and undamaged. I stuck it into some compost
in a pot in the greenhouse and it has now flowered. Can I plant it in the
garden?

Mike