Arum Lily, Calla Lily (Zantedeschia aethiopica)
Very cool double-flowered bloom! I got one too from my calla clump but it had opposing petals. Does yours do this often? I was so surprised when I saw mine, in five years it was the only time I've ever seen it happen. Hope it does it again next year!
I took a picture of mine and it's on my Yahoo photo album:
Hi jkom51! Thanks for your post. Yours is very cool too and unusual looking:-) No, I've never seen a double before and was surprised too. This is a relatively new plant that one of my neighbors gave me when she divided hers so I'm waiting to see if it does it again in the spring too!