Three thriving mature American chestnuts were discovered in 1975 in Porter County of northwest Indiana. Each was within 200 meters of one another in a small undisturbed woodland. One had several smaller chestnuts surrounding it that were of sufficient random distance from the larger to suggest seed rather than vegetative origin. This tree and its satellites showed no signs of the chestnut canker disease that has virtually eliminated large C. dentata specimens from North America, yet the fungus had long before deeply established itself in the other two large trees nearby.