Vitex agnus-castus, a Mediterranean plant, also called Chaste Tree, Chasteberry, or Monk's Pepper
The possibility that Lucius Artorius Castus was the inspiration for the figure of Arthur in medieval European literature was first suggested by Kemp Malone in 1924 and has recently been championed by authors C. Scott Littleton and Linda Malcor (who was a research consultant for the 2004 movie King Arthur and on whose hypotheses regarding Artorius the screenplay was based).
Local flora is well represented with the Armeria of Roussillon (Armeria ruscinonensis Girard), the polycarpon of Catalonia (Polycarpon polycarpoides), the Thymelaea hirsuta, the Limonium tremolsii, and also Tamarix (Tamaricaceae), and Gattiliers (Vitex agnus-castus).