Alseid
In Greek mythology, Alseids were nymphs who inhabited groves.
They are mentioned by Apollonius of Rhodes, who relates that the woman Cleite hangs herself after the death of her husband, Cyzicus, who was killed by the hero Jason. Upon her suicide:
A scholium on the Iliad states explicitly that "Alseids" is the name given to nymphs who occupy groves.