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"[Plin. Nat. 27.113.] - THLASPI AND PERSICON NAPY: FOUR REMEDIES.
Of thlaspi there are two kinds; the first of which has narrow leaves, about a finger in length and breadth, turned to wards the ground, and divided at the point. It has a slender stern, half a foot in length, and not wholly destitute of branches; the seed, enclosed in a crescent-shaped capsule, is similar to a lentil in shape, except that it has a jagged appearance, to which, in fact, it owes its name; the flower is white, and the plant is found near footpaths and in hedges. The seed, which has an acrid flavour, carries off bile and pituitous secretions, by vomit and by alvine evacuation, the proper dose being one acetabulum. It is used, also, for sciatica, in the form of an injection, this treatment being persevered in until it has induced a discharge of blood: it acts also as an emmenagogue, but is fatal to the fœtus.
The other thlaspi, known by some as "Persicon napy," has broad leaves and large roots, and is also very useful as an injection for sciatica. Both plants are very serviceable for inguinal complaints; it being recommended that the person who gathers them should mention that he is taking them for diseases of the groin, for abscesses of all kinds, and for wounds, and that he should pluck them with one hand only. "
(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.)