http://www.christmascarnivals.com/Christmas-tree/christmas-tree-rash.html
Yes, there are quite a few types, it seems.
Mine was cause by tick bite
It was a tree shaped in a cross, it was reused.
Japanese Empress Tree or Paulownia tomentosa
A pine tree is a tree that produces seed bearing cones and has leaves shaped liked needles.
The water apple tree.
A pine tree!
You might have been bitten by a bug and had a reaction to it and that is what happend.
poplar
alder
magic wand shaped
Ginkgo Biloba
It might be ringworm. If it's just like, a circle that's not filled in, it's ringworm. If it's a filled in circle, it might be a normal rash that's, well, circle-shaped.