ACOTYLEDONS. — LICHENS. Cenomycc. Gl 



Formerly used, at the suggestion of Dr. Mead, as a cure for the bite 

 of a mad dog, but without success. 



G. P. polijdachjla, thaUus glaucous green naked glabrous with 

 biovvn reticulated veins beneath, fertile lobules very n'merous 

 elongate asul as well as the brown terminal apothecia cucul- 

 lato-revolute. ylcli. Syn. Lick. p. 2-4 S. Lichen caninii a, y. 

 Us^htf.p.SAQ. Lklien polydaclylas, Jacq. Coll. 1. 14. J. 2. 

 a. 6. 



Hab. On the ground, but rather rare, Lighff. 



22. NEPHROMA. 



Universal receptacle foliaceous, coriaceo-membranaceons, spread- 

 ing, lobed, free, and naked, or hairy beneath. Partial recepl. 

 rcsupinate (on the underside), formed upon a produced por- 

 tion of the iijiper surface of the thallas, reniform, adnate, 

 coloured, plane, its margin of the same substance as the 

 ikallus. 



1. N. resvpinata, thalius greyish brown pale pubescent and gra- 

 nulated beneath, fertile lobules very short, apothecia large nu- 

 merous reddish, ylck. Syn. Lick. p.2A\. Liclie7i resupi- 

 vatus, Light/: p, 843. E. B. t. 305. 



Hab. Rocks among moss, on the stems and roots of trees, not un- 

 common. Dumi)arton castle, Sir J. E. Smith. Sides of Loch I,(j- 

 mond, at Inveriiry, and in Aros Mull, Mr, Turner and Hook. 



Readily distinguisiied as a genus from the la.st, by bearing its apothe- 

 cia on the under instead of tlie upper side of the thalius. 



23. EVERNIA. 



Universal receptacle subcrustaceous, branched, and laciniated, 

 angular or compressed, nearly erect or pendulous, with a cen- 

 tral thread within. Partial recept. scutelliform, sessile, the 

 disk concave, coloured with an inflexed margin formed of the 

 ikallus. 



\, E. pru?iastri, thalius greenish white segments dichotomous 

 multifid ascending linear-attenuate plane pitted, grooved and 

 u-hite beneath, apothecia bright brown concave. Ach. Syn. 

 Lick. p. 245. Licken primastri, Lightf. p. 835. , E. B. 

 t. 859, and 1353 {Lichen stictoceros) . 



Hab. Branches of trees, common. 



Sect. III. CEPiiAi-OiDEr. Apothecia snhglohose^ternnnal on the 

 branches or Podetia of the thalius, or scattered, sessile, im- 

 marginaie. 



A. Apotkecia covered hy the mass of fructification . 

 24. CENOMYCE. 

 Universal receptacle crustaceo-cartilaginous, foliaceous,. laci- 

 niated, subimbricated, free (rarely adnate, uniform, or want- 



