Commentary. The first species of Dioscorides corresponds to our author’s, and is marked as the Equisetum Fluviatile by Sprengel, which is called in English the Horse-tail. The other is the E. Limosum. Apuleius recommends it in dysentery and spitting of blood. Aëtius recommends it in the same complaints. But both, in fact, only borrow from Dioscorides and Galen, especially the latter, who treats of it more fully than Dioscorides. The Arabians give exactly the same account of the Equisetum; indeed they profess to borrow everything from Dioscorides and Galen. See in particular Serapion (137), and Avicenna (ii, 2, 200.)
Ἱπποφαὲς ἤ Ἱπποφαῖος,
Hippophaes, used for scouring clothes. It is a branchy shrub, the root of which contains juices which are extracted like those of Thapsia. One obolus of the juice mixed with the flour of tares, purges phlegm and bile; and the whole plant, when dried, becomes purgative.
Commentary. Without entering into the discussion regarding this plant, we shall merely observe that we are disposed to agree with those who refer it to a species of spurge, namely, Euphorbia spinosa. Dioscorides describes it as being cholagogue, hydragogue, and phlegmagogue. (iii, 159.) It does not appear that it is treated of by Galen, nor by the Arabian authorities.
Ἰρίς.
Iris, Fleur-de-lys, is calefacient, consists of very subtile particles, and is detergent and digestive. It therefore agrees with coughs, renders expectoration easy, cures tormina, and cleanses foul ulcers. When drunk with honeyed water it evacuates the bowels.
Commentary. Probably it comprehends the Iris Germanica and I. Florentina. It is the first article treated of by Dioscorides, who gives a full account of it, and concludes by saying that the different species of it are useful for many purposes. He recommends them as an external application in cutaneous diseases and ulcers, and as being soporific and alexipharmic; when drunk with wine as proving emmenagogue, and also applied in pessaries, malagmata, and acopa. The others treat of its virtues less copiously, with the exception of Serapion and Avicenna. One of Serapion’s Arabian authorities, Aben Mesuai, says it purges yellow bile and black bile, and is deobstruent in obstructions of the liver. He also mentions it as a sternutatory and masticatory. (De Simpl. 189.) Avicenna’s characters of the Iris are in the main derived from Dioscorides, but altogether his description of it is very interesting. He recommends it very particularly in diseases of the rectum and uterus, both when administered internally and in a hip-bath. He also represents it as proving useful in gonorrhœa, and in the pollutio nocturni somni. He concludes by calling it a general alexipharmic (ii, 2, 349.) The root of the Florentine Iris or Flower de Luce, was used in the practice of medicine down to a late date. See Quincy and Boerhaave. It is still kept in the shops, and has the character of being a drastic hydragogue. Gray, Suppl. to Pharmacop. (251.) It retains a place in the Modern Greek Pharmacopœia.
Ἰσάτις.
Isatis, Woad; the garden species which dyers use, is of a desiccative nature, having also some astringency. By means of these powers it agglutinates even the large wounds of hard bodies, is of use in hemorrhages, discusses œdematous swellings, and opposes the progress of all malignant diseases. The wild is more pungent, and on that account being more desiccant, it the more strongly resists all humid gangrene, but for all other purposes it is worse as being pungent. Owing to its strong powers, it is useful in affections of the spleen.
Commentary. Dr. Martyn says, “The Woad is called Isatis and Glastum, and affords a blue tincture.” (Ad Virg. Ec. iv, 43.) See also Miller, Parkinson, and Gerard. It is the Isatis Tinctoria. The second species of Dioscorides, or Sylvestris, is the Saponaria Vaccaria, L., but the passage is probably spurious. Our author’s account of the Isatis is abridged from Galen, who has an elaborate article under this head. Aëtius copies still more closely from Galen. Both these authorities direct bread or barleymeal to be mixed with its pounded leaves when they are otherwise too strong. Of the Arabians, Avicenna gives the most accurate account of it under the head of Nil seu Glastum sativum et sylvestre. In its external use he follows Dioscorides and Galen, and joins Rhases in recommending it internally as an emetic for the cough of children, ulcers of the lungs, and pleurisy arising from black bile. He further commends the wild species in affections of the spleen. (ii, 2, 505, 290, 299.) Serapion and Rhases give a confused account of the Isatis, under the head of Indicum. (De Simpl. 47); (Cont. l. ult. 370.) The Woad held a place in our Dispensatory down to a recent date. See Quincy (91.) Woad and indigo were long used together in dyeing, which probably is the reason of these two articles being confounded together by certain of the ancient authorities.