"[Plin. Nat. 24.94.] - THE ARISAROS: THREE REMEDIES.
There is a plant also called the “arisaros,” which grows in Egypt, and is similar to the aron in appearance, only that it is more diminutive, and has smaller leaves; the root too is smaller, though fully as large as a good-sized olive. The white arisaros throws out two stems, the other kind only one. They are curative, both of them, of running ulcers and burns, and are used as an injection for fistulas. The leaves, boiled in water, and then beaten up with the addition of oil of roses, arrest the growth of corrosive ulcers. But there is one very marvellous fact connected with this plant—it is quite sufficient to touch the sexual parts of any female animal with it to cause its instantaneous death.”
(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. 27.36.] - THE CALYX: THREE REMEDIES.
Of the calyx there are two kinds. One of these resembles arum, and is found growing in ploughed soils; the proper time for gathering it being before it begins to wither. It is employed for the same purposes as arum; and an infusion of the root is taken as a purgative and as an emmenagogue. The stalks, boiled with the leaves and some pulse, are curative of tenesmus. ”
(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.)