Board of Green Cloth
So called because the lord steward and his board sat at a table covered with green cloth. It existed certainly in the reign of Henry I., and probably earlier, and was abolished in 1849.
“Board of Green Cloth, June 12th, 1681. Order was this day given that the Maides of Honour should have cherry-tarts instead of gooseberrytarts, it being observed that cherrys are three-pence a pound.”
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894