There is no single specific Wicca or Wiccan tree. Individual Witches or Wiccan groups may use certain images and symbols, such as the Celtic World Tree, or the Kabala Tree of Life. Earth witches often work with specific trees, using bark, sap, leaves, seeds or wood from different trees for various spells, charms and other purposes. But there is no "Wicca Tree" as such.
The Elder Tree... as is quoted in the long form of the Wiccan Rede, "Elder is the Lady's tree, burn it not or cursed you'll be."
The Tree, The Complete Book of Saxon Witchcraft.
Wiccan tree as in Yule tree? There aren't very many rules in Wicca, Paganism, or Witchcraft. Take it down when you feel like taking it down.
Wicca has its own scriptures.
Wicca isn't based anywhere.
Wicca isn't based anywhere.
No. Wicca is a religion, not a language.
Yes, Faerie Wicca is practiced.
Georgian Wicca was created in 1970.
Wicca Craft was created in 1991.
As Wicca is a religion focusing not on race, but on the belief structures of the individual, there is not (to my knowledge) a specific African-American Wicca. If you are asking if there is a participation by African-Americans in wicca, then the answer is yes.
When a person celebrates Wicca, they are celebrating their faith within it. Wicca is not only a religion, but it's a way of living, and most Wiccan's actually celebrate Wicca every day they are part of it.