When the Trunen (Druids) go to harvest mistletoe, the Hopatatsch (the high priest) leads the procession, wearing black robes on a black steed with silver bridle. The Master of Ceremonies rides barefoot at his side on a white steed with golden bridle. He carries a golden sickle in his hand which ends in a snake's head. When they arrive, they ride around the "mistletoe bush" three times. Then the lower Druids come with their large, snow-white cloth and spread it out under the tree. The Master of Ceremonies then rides to the "mistletoe tree," says his prayer, puts on a white robe and cuts the "mistletoe bush" with a golden sickle whose handle must be wrapped in a white cloth. The mistletoe is caught by the Druids below in the large white cloth.
From:  From: Franz Ferk: "Über Druidismus in Noricum." [On Druidism in Noricum] Graz 1877; pp. 46.