Wild Poinsettia, a native species, has been added to the USWildflowers database (01/25/2012.) Scientific name is Euphorbia cyathophora.  Photo below was taken at the Coquina Baywalk on Leffis Key, Manatee County, FL, on December 22, 2011. Go to the Wild Poinsettia detail page for more photos and information.

Wild Poinsettia, Mexican Fireplant, Fire on the Mountain, Painted Euphorbia, Desert Poinsettia – Euphorbia cyathophora