Mutant radioactive flowers in Nasushiobara (half-way between Tokyo and Fukushima)
twitter.com
twitter.com
They are probably not "mutant" flowers, but "deformed" flowers. Do the offspring have the new shape? The flowers in the florist shop are filtered and you only see the good locking flowers.
For example in https://www.google.com/search?tbm=isch&q=mutant+flowers
First image: https://commons.wikimedia.org/wiki/File:Flower-Mutant-1145.j...
> Flower head with a mutated floret cluster (unknown species). (North Texas) [...] 12 April 2009
Second image: http://www.enchantedtree.com/flowers.html (near the middle of the page)
The image doesn't have a clear caption, but it's probably from Virginia in the summer 2004.
Gerbera x hybrida
But, if is mutated by radioactivity and is a stable mutation then you have a new and perfectly marketable product.