Myrtle branches with snipped tops may not be taken as part of the four species \u2022 Regeneration through a budding berry from the snipped top can restore the myrtle's eligibility \u2022 Binding the four species: by strand according to Rabbi Yehuda, and even by hand according to the Rabbis \u2022 Too many ripe berries ruin the branch \u2022 Willow branches don't need to grow on the bank of a brook to be eligible