This question came in to the PBS website. If you have any thoughts for Wilma, please contact her directly. Thanks, Mike From: Wilma [mailto:email@example.com] This is a message from the PBS website. Hi, I have a Zantedeschia aethiopica (spotted leaf white giant) plant. The plant has produced a double flower (same stem but two flowers in one, facing each other, with 3 yellow stamens in the centre. Is this a common occurrence?