I is Iodhadh, or Idad, the Yew tree. Much like the Death card in the Tarot, the Yew is known as a marker of death and endings. This evergreen tree has leaves that are attached in a spiral pattern to the twigs. Because of its unusual growth pattern, in which new growth forms inside the old, the Yew is strongly tied to rebirth and new life following death.
The Yew has no medicinal value at all, and in fact is mostly toxic. Livestock have been known to die from eating the poisonous leaves. Berries can be used, but should be treated with caution. On a practical level, the wood of the Yew tree is very hard and resistant to water damage, so it was popular in the making of longbows in England.
In A Modern Herbal, Maud Grieve says of the Yew, "No tree is more associated with the history and legends of Great Britain than the Yew. Before Christianity was introduced it was a sacred tree favoured by the Druids, who built their temples near these trees - a custom followed by the early Christians. The association of the tree with places of worship still prevails.
Iodhadh Correspondences
Mundane Aspects: Although it may not represent spiritual death, if Iodhadh appears, it's a sign that major transitions are coming. Be aware of them, and realize that although not all of them are bad, they will probably be pretty significant. Now's a good time to get rid of things which are of no use to you, in order to make room for new beginnings.
Magical Aspects: Changes are on the way, so quit clinging to beliefs and ideas that no longer serve you well. Shed the old, and welcome the new. Accept change for what it is -- an asset -- and stop seeing it as an obstacle. Don't fear new things, embrace them.