Related for Sukkah 67:8

What is the tsaphtsaph? It has leaves serrated like a saw, and such a willow is not valid ; its stem is white and its leaf rounded. A myrtle and a willow which have been lopped, and palms coming out between them, are valid. The size of a myrtle and a willow must be three handbreadths, that of a palm-branch four. Rabbi Tarphon says: In a cubit there are five handbreadths. As for these four kinds of plants, just as nothing must be taken away from them so must nothing be added to them.