Cheirolophus is a genus of flowering plants in the family Asteraceae (tribe Cardueae), comprising around 20–25 species of perennial herbs and subshrubs. The genus was first formally described in 1827 and belongs to the order Asterales. Plants in this genus produce the characteristic composite flowerheads of the daisy family, typically with purple to pink tubular florets and a pappus of feathery or scale-like bristles.
The genus has a predominantly western Mediterranean distribution, centred on the Macaronesian islands — particularly the Canary Islands, where the majority of species are endemic — as well as Madeira, and extends across the western Mediterranean basin through Morocco, Algeria, Portugal, Spain (including the Balearic Islands), southern France, Corsica, Sicily, and Malta. The Canary Islands are a major centre of diversity, with numerous narrow-range endemic species found on individual islands.
Several species are of conservation concern due to their extremely restricted island ranges and small populations, including Cheirolophus crassifolius of Malta, which is one of the rarest plants in the European Union.
Etymology
The name Cheirolophus derives from the Greek words cheir (χείρ, meaning "hand") and lophos (λόφος, meaning "crest" or "plume"), referring to the hand-like arrangement of the pappus scales characteristic of the genus.
Distribution
Cheirolophus is native to the western Mediterranean Region, with its centre of diversity in the Macaronesian islands. The genus occurs in the Canary Islands, Madeira, Morocco, Algeria, continental Portugal and Spain, southern France, the Balearic Islands, Corsica, Sicily, and Malta.
Conservation
Several Cheirolophus species have extremely restricted ranges and are threatened. Cheirolophus crassifolius, the Maltese Rock-centaury, is endemic to Malta and is considered one of the rarest plants in the European Union, protected under EU Habitats Directive. Many Canary Island endemics in this genus are similarly vulnerable due to small populations, habitat loss, and invasive species pressure.
