This is the flower of the Niger seed plant ( Guizotia abyssinia ). It has grown from split seed from the bird feeders, Goldfinches love it. The species oringinates from Ethiopia and other parts of East Afirca.
@steampowered Thanks Paul, you need special feeders for niger seed, with very small slits in. Normally only Goldfinches with their very fine beaks use them.
Fab capture of the flower -- I let a whole load of them grow under my Niger seed bird feeder I suspect the goldfinch had been untidy at their meal-time !!
@beryl Thank you Beryl, yes they certainly don't eat all of the seed.
@elisasaeter Thank you very much Elisabeth