What shrub or plant is the above exactly? Most translators of Greek songs translate it as "osier"; similarly in ΛΚΝ the definition has only this meaning. But elsewhere it is translated as "vitex agnus-castus", also called "vitex, chaste tree, chasteberry, Abraham's balm, lilac chastetree, or monk's pepper, a native of the Mediterranean region."
Which is it? or is this tree used for basketry, like osier is in the U.K.: "basket willow, withy,osier" used for the same purpose?