A stylized crown formed of a sprig of common rue. Typically displayed as a bend throughout. Best known from its use in the arms of Saxony.
Crancelin (1) §
Considered to be a depiction of a ducal coronet and thus restricted to use by dukes/duchesses.
Source: Bergshammar Armorial. Artist unknown. Adapted by Mathghamhain Ua Ruadháin.