Dear Mr. Tsantekidis, could it be possible that your pictures from Knautia orientalis show Knautia degenii? According to the Flora europaea: Knautia degenii: Capitula with 10 – 15 flowers, flowers violet, corolla- tube 5 – 6 mm Knautia orientalis: Capitula 5 – 10 flowers, flowers purplish red, corolla- tube 7 – 12 mm The colour of your plant ist violett and the capitula is formed by 5 big marginal flowers and about 10 small flowers, that means altogether 15 flowers! What do you think? Best wishes Thomas