Tree Tumors

April 09, 2009


Photographer: John Adam
Summary Author: John Adam

This tree tumor, ulcer or burl was encountered while we were hiking a short section of the Appalachian Trail, near Front Royal, Virginia (off the Skyline Drive) in March 2009. This was one of the largest tumors I had ever seen! It appears that they’re rather like benign tumors in animals, possibly growing as a response to an injury or an invasion by bacteria or a virus of some kind. At the crudest possible level of description, cancer is the uncontrolled proliferation of cell growth – the normal mechanisms of inhibition are overruled or turned off, in this case as a result of the injury. Curiously, it also appears that the trees with these growths are not harmed to any significant degree.

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