I don’t remember flowers in the fall from childhood.  I lived in Pennsylvania and Connecticut; cold, then snow in the fall.  Flowers were for the spring. 

This flower appears most autumns in October or  November on the thorny succulent that lives on the front porch.  The plant has long spindly arms radiating in all directions from a bulbous spiny base.  The arms are so long that, while they start out growing upward, they end up lounging and falling to the sides of the base and eventually many touch the ground.