OCR Text |
Show H-COLOURED LIVERWORT. LICHEN CANINUS. Class XXIV. Cryptogamia. Essent. Gen. Cuar. Order II. Alge. Fructification in tubercles or shields, inverted in their proper cortical receptacles, on a variously-formed andconstructed frond. Spec. Caar. Expanded, grayish; whiter with brownish veins and fibres ERINGO-LEAVED LICHEN. LICHEN ISLANDICUS. beneath: Lobes oblong, large, broader outwards ; fertile ones scattered, marginal narrow: Shields perpendicular, revolute, roundish, anterior, tawny-rufous. EEE DESCRIPTION. Tuts lichen spreads on the ground, consisting of a leather-like ry ye ° . « substance, ash-coloured, appearing as if covered with farina, divided into lobes, beneath woolly, veined. Pelte round, or oblong, terminal, hard, solid, ascending, of a reddish brown colour. HISTORY, Found on heaths, ? dry pastures, > and woods. MEDICAL VIRTUE. The pulvis antilyssus, a powder composed of equal parts of this lichen and black pepper*, was first recommendedas a preservative against the rabies canina by Mr. Dampier, brother of the celebrated circumnavigator of that name; and bythe authority of Sir Hans Sloane it was published in the Philosophical Transactions. This powder was afterwards adopied in the London Pharmacopecia in 1721, at the desire of Dr. Mead. * This was the original composition ; but the quantity of pepper rendering the medicine too hot, the powder was afterwards prepared of twe parts of the lichen and one of pepper. oc XXIV. Cryptogamia. Order II. Alge. Esseny. Gen. Cuar. Thesameas thelast. Spec. Cwar, Leaves greenish-chesnut, sinuate-laciniate, many-cleft, segments ascending, channelled, ciliate: Shields nearly marginal, chesnut, slightly margined. Li Speenoe: DESCRIPTION. Tats lichenis foliaceous, large, the leaves crowded, connected together, membranous, tough, variously divided into. blunt lobes, turning in at the edges, and fringed with short strong bristles. The shields large, of a reddish brown colour onthe lobes of the leaves. HISTORY. Native of Britain, and found abundant on the mountains of Wales and Scotland. This is a perennial lichen, very common in Iceland, but also found in the forests and dry steril woods of Switzerland and Germany, growing upon stones and on the sarth. It has dry coriaceous le: divided into lobes and Ja. cinie, which are again notched and subdivided with elevated fins beset with short, very minute, rigid, parallel hairs, and arked with white spots, reddish towards the points. Amongst the leaves are found peltated, somewhat excavated, shining, viscid bodies, internally of a brown colour: these are the peri} |