Flowers Can Be Passed In the Charleston (Article ID 40)
Abstract: A player can pass any tile during the Charleston except for a Joker.
Question from a player: Can a Flower be passed in the Charleston?
Answer from the NMJL: “Flowers may be passed during the Charleston.”
Source: Mah Jongg Made Easy 2020 page 24, Special Rulings for the Use of Flowers #2 https://www.nationalmahjonggleague.org