I was reading something about arctic plants that said that the shiny petals of Ranunculus could focus light/heat on the developing seed in the middle. The petals certainly are reflective. As children, we would hold bouquets of buttercups under each other's chins to see the yellow reflection and say "do you like butter?" Thank you for the thermogenesis references. There's not a lot that plants can't do. I just hadn't known that they could do that, too. Today in Massachusetts we have a few inches of new snow, the hideous stuff is still coming down, so no crocuses yet. Jane Sargent _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…