The salt-preserved cherry blossom used in sakurayu is called sakurazuke (or pickled cherry blossom), and the calyces is removed from the blossom before it is pickled in plum vinegar and salt.
桜湯に用いる桜の花の塩漬けは桜漬けとも呼ばれ、がくを除いた花全体を梅酢と塩で漬け込む。