What is Articuli Super Chartas?

Legal Definition
Articles upon the charters. The title of a statute passed in the twenty-eighth year of Edward I. st. 3, confirming or enlarging many particulars in Magna Charta, and the Charta de Foresta, and appointing a method for enforcing the observance of them, and for the punishment of offenders. 2 Reeve, Hist. Eng. Law, 103, 233.
-- Black's Law Dictionary
Legal Definition
An act passed about 1300 amending the Magna Charta and the Charta de Foresta.
-- Ballentine's Law Dictionary