Hemlock : any of several poisonous herbs of the carrot family.
Lethe : the River of Oblivion, one of the rivers of the lower regions whose water had the power to make those who drank forget their previous existence.
Dryad : wood nymph, from Greek dryas, tree.
Flora : the goddess of flowers and the Spring, whose festival was celebrated at the end of April with much debauchery.
Provencal : pertaining to Provence, a region of South Eastern France, known for its troubadours.
Hippocrene : literally the ‘horse’s fountain’, a spring on Mount Helicon, the waters of which possessed the power of poetic inspiration.
Them : her lustrous eyes, ie new love will last just one day.
Bacchus : god of wine, son of Semele, orchestrator of riots and debauchery.
Pards : leopards were usually shown pulling the chariot of Bacchus.
Fays : fairies.
Darkling : in the dark.
Sod : become a sod : ie be dead, part of the earth.