Broken-hearted, Demeter wandered the earth, looking for her daughter until Helios revealed what had happened. Demeter was so angry that she withdrew herself in loneliness, and the earth ceased to be fertile. Knowing this could not continue much longer, Zeus sent Hermes down to Hades to make him release Persephone. Hades grudgingly agreed, but before she went back he gave Persephone a pomegranate (or the seeds of a pomegranate, according to some sources). When she later ate of it, it bound her to underworld forever and she had to stay there one-third of the year. The other months she stayed with her mother. When Persephone was in Hades, Demeter refused to let anything grow and winter began. This myth is a symbol of the budding and dying of nature. In the Eleusinian mysteries, this happening was celebrated in honor of Demeter and Persephone, who was known in this cult as Kore.
The Romans called her Proserpine.