This Thuja Occidentalis was collected by me in 2010 I believe. It was collected in northern MN. It was grown into a rock formation, but the rock was more sedimentary than much of the rock here in northern MN. One simple use of a pry bar revealed it's root systems in a small amount of duff. The only thing really holding the tree in place was the wedge of rock I pryed off.
The current picture is the slab that Ron Lang made for me.
There is a branch in the middle of the tree that was removed for the sake of opening up a design. This 1.5 inch branch was cut, sanded, oiled, photographed and there were 70 plus rings. This is a very old tree.
Most of my collection revolves around yamadori from Northern MN. I won't post all of them here, but you can check out my photo blog. I have some shohin versions of this tree that I gathered this fall.
Here's the existent thread
http://bonsainut.com/forums/showthread.php?10448-White-Cedar-Yamadori