I was walking the dog through a field of dandelions and found this gigantic mutant amongst the others. This dandelion has three flower heads! Insane. I likened it to a four leaf clover, a strange mutation but nothing too "out there".
When I got home I put the dandelion in the fridge and did some Google-investigations. I found out that the proper term for this kind of growth is "fasciation" or "cresting". The growth is caused by a mutation in the meristematic cells, by insect or mite attack, or by chemical or mechanical damage (that sentence was stolen from this web address http://www.bloginfrance.com/2012/the-attack-of-the-mutant-dandelions/).