Many years ago, a friend and I were squirrel hunting early in the season in the Manistee national forest N.E. of Colfax and found a stand of pine trees that were cut off about 25' up. On top of each of the cut trees were 4 clay flower pots setting in wood crosses with plants growing in each. We assumed it was pot and we counted 40 or so cut trees. We decided not to hunt that area any more.