Mutated sunflower was found in Manno cho Kagawa prefecture. Kagawa is in Shikoku.
– Mutated sunflower in Kagawa prefecture (Fukushima Diary, Sep 19, 2012):
For the question of the prefectural agriculture and distribution department, an expert commented it may be prolification flower, which is a sort of mutation. This is a rare phenomenon for sunflower.
General causes are
1. Excessive fertilizer
2. Unusual heat
However, it was growing naturally.
The central flower is about 20cm diameter, 14 other ones are 3cm diameter.
It withered 1 week later.