(Vitex agnus-castus), aromatic shrub growing to 5 metres (about 16 feet) tall, bearing spikes of rose-lavender flowers. It belongs in the verbena ... Found on http://www.britannica.com/eb/a-z/c/60
a shrub or small tree, Vitex agnus-castus, of southern Europe, having aromatic, hairy leaves and long clusters of fragrant, pale lilac-blue flowers. Also called Found on https://www.infoplease.com/dictionary/chaste-tree