Mistletoe white berries that it bears in clusters of two to six. The Eastern mistletoe of North America is similar, but has shorter, broader leaves and longer clusters of 10 or more berries. The word 'mistletoe' derives from the older form 'mistle' adding the Old English word "tān" (twig). 'Mistle' is common Germanic (Old High German "mistil", Middle High German "mistel", Old English "mistel", Old Norse "mistil"). Further etymology is uncertain, but may be related to the Germanic base for 'mash'. Parasitism has evolved at least 12 times among the vascular plants . Molecular data show the mistletoe habit has evolved
Ritual of oak and mistletoe Ritual of oak and mistletoe The ritual of oak and mistletoe is a Celtic religious ceremony, in which white-clad druids climbed a sacred oak, cut down the mistletoe growing on it, sacrificed two white bulls and used the mistletoe to make an elixir to cure infertility and the effects of poison. The ritual, known from a single passage in Pliny's "Natural History", has helped shape the image of the druid in the popular imagination. The only extant source for this ritual is a passage in the "Natural History" by Roman historian Pliny the Elder, written in the 1st century AD.