Cheirolophus crassifolius, the Maltese centaury, Maltese rock-centaury or Widnet il-Baħar, is a species of flowering plant in the Asteraceae family. It is endemic to Malta, where it has been the national plant of Malta since 1973. Its natural habitats are cliffs and coastal valleys . It is threatened by habitat loss. It is scarce but widespread in the wild on the western cliffs of Malta, rare on the southern cliffs of Gozo, but frequent as a cultivated species in roundabouts. It is quite common in the limits of Wied Babu in the south east of Malta.