Potamogiton,[1160] too, taken in wine, is useful for dysentery and cœliac affections: it is a plant similar to beet in the leaves, but smaller and more hairy, and rising but little above the surface of the water. It is the leaves that are used, being of a refreshing, astringent nature, and particularly good for diseases of the legs, and, with honey or vinegar, for corrosive ulcers. Castor has given a different description of this plant. According to him, it has a smaller leaf,[1161] like horse-hair,[1162] with a long, smooth, stem, and grows in watery localities. With the root of it he used to treat scrofulous sores and indurations. Potamogiton neutralizes the effects of the bite of the crocodile; hence it is that those who go in pursuit of that animal, are in the habit of carrying it about them. Achillea[1163] also arrests looseness of the bowels; an effect equally produced by the statice,[1164] a plant with seven heads, like those of the rose, upon as many stems. CHAP. 34.—THE CERATIA: TWO REMEDIES. LEONTOPODION, LEUCEORON, DORIPETRON, OR THORYBETHRON. LAGOPUS: THREE REMEDIES. The ceratia[1165] is a plant with a single[1166] leaf, and a large knotted root: taken with the food, it is curative of coeliac affections and dysentery. Leontopodion,[1167] a plant known also as “leuceoron,” “doripetron,” or “thorybethron,” has a root which acts astringently upon the bowels and carries off bile, being taken in doses of two denarii in hydromel. It grows in champaign localities with a poor soil: the seed, taken in drink, produces night-mare,[1168] it is said, in the sleep. Lagopus[1169] arrests diarrhœa, taken in wine, or, if there are symptoms of fever, in water. This plant is attached to the groin, for tumours in that part of the body: it grows in cornfields. Many persons recommend, in preference to anything else, for desperate cases of dysentery, a decoction of roots of cinquefoil in milk, or else aristolochia,[1170] in the proportion of one victoriatus[1171] to three cyathi of wine. In the case of the preparations above-mentioned, which are recommended to be taken warm, it will be the best plan to heat them with a red-hot iron.