The 18th letter of the Ogham tree alphabet, representing the letter U and meaning "heather."
Red heather is a sign of passion, while white heather acts as a protection against acts of passion. Ur is an indication that you should find a "magnificent obsession" for yourself, something big, imaginative, and a true test of your abilities.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...