花牌 is read as かはい (kahai) and means hanafuda.
かはい
kahai
かびん
(flower) vase
はなびら
(flower) petal
はな
(the) best
はなみ
cherry blossom viewing
はなぞの
flower garden
はなび
fireworks
はながた
star (actor, player, etc.)
はなたば
bunch of flowers
はなよめ
bride
かだん
flower bed
はなむこ
bridegroom
かりゅうかい
red-light district