Sheafs of grain : a goddess of Spring growing things; a tie to Demeter.
A flaming torch : a reference to her journey though the Underworld and bringing life to earth.
Asphodel : a field of this grows in the Underworld where the dead dwell.
Both the pomograntet and the asphodel have been associated with Persephone as her symbols.
pomegranate
Here most common symbol is the Pomegranate.
A explanation of the changing seasons.
Persephone used a silver bow and arrow and often in her mothers steps(Demeter) used a staff
Persephone is often robed, holding sheafs of grain and a flaming torch. A flower that shows her as Queen of the Underworld is asphodel. Being a Queen, she had no need of a weapon.
In the context of objects such as Zeus' master bolt or Poseidon's trident, the closest I could find was a pomegranate.
Hera is the goddess of marriage, women, and birth, and the pomegranate is a symbol of marriage, marital love, and fruitfulness.
It is a symbol of his rule of his dead, and more then that it can be disribed as a three-forked spear, or a staff, that takes living bodies down along the buried road to the Underworld and was mentioned in the myth of Persephone.
She is on the North Carolina state seal, along with Persephone who is holding a cornucopia, a symbol of plenty and a good harvest.
Persephone's symbol in Greek Mythology is the pomegranate. It represents the fruit she consumed in the Underworld, which tied her to Hades and resulted in her spending part of the year in the underworld, leading to the changing seasons.
Persephone enemy was Methane because she slept with Persephone's husband, Hades.