Centaurium (centaury) is a genus of 20 species in the gentian family (Gentianaceae), tribe Chironieae, subtribe Chironiinae. The genus was named after the centaur Chiron, famed in Greek mythology for his skill in medicinal herbs. It is distributed across Europe and Asia.
Until 2004, Centaurium was given a much wider circumscription, comprising about 50 species ranging across Europe, Asia, the Americas, Australasia, and the Pacific. However this circumscription was polyphyletic, so in 2004 the genus was split into four, being Centaurium sensu stricto, Zeltnera, Gyrandra, and Schenkia.[1]
According to Plants of the World Online there are 24 species of Centaurium.[2]