7. Peltidea canina, Ach.—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 (αντι, against, and λυσσα, canine madness) of the London Pharmacopoeia for 1721.