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"[Plin. Nat. 20.78.] - THE WILD POPPY CALLED CERATITIS, GLAUCIUM, OR PARALIUM: SIX REMEDIES.
There is one variety of wild poppy known as “ceratitis.” It is of a black colour, a cubit in height, and has a thick root covered with bark, with a head resembling a small bud, bent and pointed at the end like a horn. The leaves of this plant are smaller and thinner than those of the other wild poppies, and the seed, which is very diminutive, is ripe at harvest. Taken with honied wine, in doses of half an acetabulum, the seed acts as a purgative. The leaves, beaten up in oil, are a cure for the white specks which form on the eyes of beasts of burden. The root, boiled down to one half, in doses of one acetabulum to two sextarii of water, is prescribed for maladies of the loins and liver, and the leaves, employed with honey, are a cure for carbuncles.
Some persons give this kind of poppy the name of “glaucion,” and others of “paralium,” for it grows, in fact, in spots exposed to exhalations from the sea, or else in soils of a nitrous nature.”
(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.)

"[Plin. Nat. 25.50.] - PLANTS WHICH HAVE BEEN DISCOVERED BY CERTAIN ANIMALS. CHELIDONIA: SIX REMEDIES.
The brute animals also have been the discoverers of certain plants: among them, we will name chelidonia first of all. It is by the aid of this plant that the swallow restores the sight of the young birds in the nest, and even, as some persons will have it, when the eyes have been plucked out. There are two varieties of this plant; the larger kind has a branchy stem, and a leaf somewhat similar to that of the wild parsnip, but larger. The plant itself is some two cubits in height, and of a whitish colour, that of the flower being yellow. The smaller kind has leaves like those of ivy, only rounder and not so white. The juice of it is pungent, and resembles saffron in colour, and the seed is similar to that of the poppy.
These plants blossom, both of them, at the arrival of the swallow, and wither at the time of its departure. The juice is extracted while they are in flower, and is boiled gently in a copper vessel on hot ashes, with Attic honey, being esteemed a sovereign remedy for films upon the eyes. This juice is employed also, unmixed with any other substance, for the eyesalves, which from it take their name of “chelidonia.””
(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.)