The flower symbol represented the royal matriarch who had survived the flood.
She was descended from Cain,
and was Ham's wife,
Naamah.
It was Cain's line that had the pre-flood giants,
who had been the founders of pre-flood Sumer.
Naamah was the only survivor of that line,
and from her came the post-flood giants.
These giants believed themselves to be gods.
After Ham dumped Naamah because Noah had cursed their son Canaan,
she had sons with Canaan.
Among these sons were the post-flood giants,
a couple of whom were those having helped reestablish post-flood Sumer in Mesopotamia.
That those kings wore that symbol,
they were saying they were the sons of the Anunaki.