7. Peltidea canina, Ach.—Ash-coloured Ground Liverwort.

Botanical name: 

Fig. 161. Peltidea canina. Peltidea canina, Ach. Syn. p. 239; Lichen caninus, Linn.; Lichen cinereus terrestris, Woodville, Med. Bot. vol. iv; Ash-coloured ground liverwort.

This species, and also Peltidea rufescens, Ach., are sold in the herb-shops as Ground Liverwort. It formerly was in repute as a preservative against the bite of a mad-dog [Phil. Trans. vol. xx. p. 49; Mead, A Mechan. Account of Poisons, 5th ed. p. 165, Lond. 1756.], and, mixed with half its weight of black pepper, it formed the pulvis antilyssus (άντι, against, and λύσσα, canine madness) of the London Pharmacopoeia for 1721.

The Elements of Materia Medica and Therapeutics, Vol. II, 3th American ed., was written by Jonathan Pereira in 1854.