-History---The name of the genus to which it is at present assigned, Erythraea, is derived from the Greek erythros (red), from the colour of the flowers. The genus was formerly called Chironia, from the Centaur Chiron, who was famous in Greek mythology for his skill in medicinal herbs, and is supposed to have cured himself with it from a wound he had accidentally received from an arrow poisoned with the blood of the hydra. The English name Centaury has the same origin. The ancients named the plant Fel Terrae, or Gall of the Earth from its extreme bitterness. The old Engiish name of Felwort is equivalent in meaning to this, and is applied to all the plants of the Gentian family. It is also thought to be the 'Graveolentia Centaurea' of Virgil, to which Lucretius gives the more significant epithet of tristia, in reference to this same intense bitterness. As this bitterness had a healing and tonic effect attributed to it, we sometimes find the Centaury called Febrifuga and Feverwort. It is known popularly also as Christ's Ladder, and the name Centaury has become corrupted in Worcestershire to 'Centre of the Sun.'