''Cheirolophus crassifolius'', the Maltese centaury, Maltese rock-centaury or Widnet il-Baħar, is a species of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

in the family

Asteraceae Asteraceae () is a large family (biology), family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the Order (biology), order Asterales. The number of species in Asteraceae is rivaled only by the Orchi ...

. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Malta Malta, officially the Republic of Malta, is an island country in Southern Europe located in the Mediterranean Sea, between Sicily and North Africa. It consists of an archipelago south of Italy, east of Tunisia, and north of Libya. The two ...

, where it has been the national plant of

since 1973. Its natural

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

s are cliffs and coastal

valleys A valley is an elongated low area often running between hills or mountains and typically containing a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a ve ...

. It is threatened by

habitat loss Habitat destruction (also termed habitat loss or habitat reduction) occurs when a natural habitat is no longer able to support its native species. The organisms once living there have either moved elsewhere, or are dead, leading to a decrease ...

. 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. It was first described by Stefano Zerafa, around 1830, as the only species of the monotypic

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

''Palaeocyanus''. However, around the year 2000, it was transferred to ''Cheirolophus'', in the light of genetic studies done in that year. The name ''Cheirolophus'' means hand-crest, referring to the hand-shaped bract tips of the most species in this genus, while ''crassifolius'' mean thick leaves. The leaves are succulent and spoon shaped. The variety ''serratifolia'' (serrated leaves) is very rare, and only known from

Gozo Gozo ( ), known in classical antiquity, antiquity as Gaulos, is an island in the Malta#The Maltese archipelago, Maltese archipelago in the Mediterranean Sea. The island is part of the Republic of Malta. After the Malta Island, island of Malta ...

. This species is cultivated due to its national importance.

References

Cardueae Critically endangered plants Plants described in 1829 Endemic flora of Malta National symbols of Malta Taxonomy articles created by Polbot Taxa named by Antonio Bertoloni {{Cynareae-stub