COMMENTARY. Our author’s account of the limonium is borrowed from Dioscorides, who describes the plant as having leaves like beet, but more slender and longer, a slender straight stem, like that of the lily, filled with red fruit of an astringent taste. Like our author, he recommends it in cases requiring astringents. As far as we can judge, the characters here given it by Dioscorides apply very well to the plant called sea lavender or red behen, namely, the _Statice Limonium_, L. Compare Parkinson (Theatre of Plants, 1234) and Gray (Suppl. to the Pharmac.) with Dioscorides (iv, 16.) There seems no necessity, therefore, for following Gesner in transferring it to the _Polygonum Bistorta_. The other authorities, both Greek and Arabian, follow Dioscorides closely in treating of the limonium. See Rhases (Cont. l. ult. i, 423); Avicenna (ii, 2, 433); Ebn Baithar (ii, 452.) The German editor of the last of these, we are glad to find, agrees with us in referring this article to the _Statice Limonium_. Λειχὴν, Lichen; that upon rocks, which is like moss, being possessed of detergent and, at the same time, moderately refrigerant and desiccative powers, cures lichen, and is anti-inflammatory; and, as Dioscorides says, also stops hemorrhages. The lichens of horses, when triturated with vinegar, are said to cure epilepsy and the bite of every venomous animal. * * * * * COMMENTARY. Our author’s account of the vegetable is abridged from Dioscorides, who, as stated by him, recommends it for stopping hemorrhages, and also for dispelling phlegmons and curing lichens: he adds, that it cures jaundice and removes defluxions of the mouth when rubbed in with honey. (iv, 53.) To which of the Lichenales of modern botanists it is applicable is somewhat doubtful: whether to the _Sticta pulmonacea_, as Matthiolus held; to the _Peltidea aphthosa_; or to the _Peltigera canina_. Compare Sprengel (Ad Dioscor. l. c.) with Lindley (Veg. King. 48), and Parkinson (1315.) This is also evidently identical with the second species of lichen described by Pliny. (H. N. xxvi, 10.) His former species is the _Marchantia conica_, L. (Ibid.) See Harduin (apud l. c.) The λέιχηνες ἱππῶν are the well-known callosities forming at the knees of horses, called _spavins_ in English. See further, Harduin ad Plin. H. N. xxviii, 49. They are thus described by Cælius Aurelianus: “Sunt autem squamulæ anteriorum crurum sub armorum partibus in ipsis animalibus (equis) nata; has Græci lichenas vocant, sive chelidonas, nos vero impetigines vel hirundines.” (Tard. Pass. i, 4.) The Empirics gave them for the cure of epilepsy. (Ibid.) See Avicenna (ii, 233) and Rhases (Cont. l. ult. 271.) Λεοντοπέταλον, Leontopetalum, _Lion’s-leaf_; its root is heating and desiccative in the third degree, and is possessed of discutient powers. * * * * *