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"[Plin. Nat. 27.81.] - TE MYAGROS: ONE REMEDY.
The myagros is a ferulaceous plant, with leaves like those of madder: the seed is of an oily nature-indeed, an oil is extracted from it. Ulcerations of the mouth are cured by rubbing them with the juice of this plant."
(The Natural History. Pliny the Elder. John Bostock, M.D., F.R.S. H.T. Riley, Esq., B.A. London. Taylor and Francis, Red Lion Court, Fleet Street. 1855.)