Have you ever seen one with just one broom in it TC3?Genetic mutation is another creature altogether. It's usually only witnessed in one section... a true anomaly.
What is the proper term for spurious growth caused by stress ? I ask because I use the term 'witches broom' for both that & the mutated growth.there is Pinus taeda nana as well; mature loblollies at 20'. Cool little trees.
"Witches' broom" is dwarfed tufted mutated growth , yes, but it can be caused by many factors. I never heard the radiation or cemetery theories before, but hey...