Nine Woods Used in a Wiccan Bonfire
Nine types of wood are commonly placed into a traditional Wiccan balefire. Collectively these are known as "The Nine Woods" or "Nine Woods". These woods are Birch (representing The Goddess, or female energy), Oak (representing The God, or male energy), Hazel (representing knowledge and wisdom), Rowan (Mountain Ash) (representing life), Common Hawthorn (representing purity and fairy magick), Willow (representing death), Fir (representing birth and rebirth), Apple (representing love and family), and Vine. In some regions, superstition, religious belief, or tradition prohibits the cutting of certain trees, most notably in Witchcraft customs the Elderberry tree; "Elder be ye Lady's tree, burn it not or cursed ye'll be" --A rhyme from an Oral tradition.
This info was taken from: http://en.wikipedia.org/wiki/Bonfire Links shown here are external to this web.
"Nine Woods in the Cauldron go, burn them fast and burn them slow."
I do not know but I wonder if the Nine Woods have anything to do with the Nine Muses.