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U6 llO.Psoroma. 4. CENOTHALAME.E. PLceU.apk.
7. Psoroma 7mis€orum. Moss psorome.
Crust scalelike, brownish livid; lobes irregularly and
deeply torn jagged; apotliecia thick; centre flat, obscurely
blackish red, even with the thalloid border, which afterwards
becomes very small.
Lichen carnosus, Dicks. Crypt. 2,21 ;
Lichen hypnorum, Jchar. Prod. 93.
Parmeliii lijpnoium, ^4c/itir. Melh. 185.
Lecanora hypnoi uei, Achar, Lick. 417.
Among and upon rather rotten mosses.
Engl. Hot. 1684.
8. Psoroma hriinneum. Brown psorome.
Crust tiledlike, granulatedly lobed, liver-grey ; apothecia
innate in the crust, very crowded, not uniform ; centre rather
convex, brown red ; thalloid border raised, crenulate,
persistent.
Lichen. pezizoide-, Dicks. Crypt. 1,10,
Lichen uiuliifloriis, Ehrh. Crypt. 156.
Lichen brunneus, Swarlz Nov. Act. Upsal. 4, 247 ; Engl. Bot. 1246.
Psora nebuiosa, Hofffii, Germ. 166.
Psora brunnea, Ilojf'm. Germ. 166.
Parmelia brunnea, Achar. Mtih. 1S6.
Lecanora brunnea, Achar. Lich. 419.
On the ground, and upon rotten mosses.
XXI. 111. PLACODIUM. Acharius. Placodium.
Thallus cruslaceous, flat, expanded, adnate, uniform,
the circumference figured, radiated, stellate, and slightly
lobed; apothecia saucershnpe, thick, adnate, sessile; pro-
I'werous flake forming the centre, plano-convex, coloured,
covering the apothecium above ; inside cellularly striated;
border rather thick, formed of the thallus ajid the
same colour, nearly free.
1 . Placodium epigeiim. Ground placodium.
Crust plaited, wrinkled, whitish ; circumference smooth,
lobed ; apothecia blackish brown, growing rather convex
in the centre; thalloid border thin, not in the least cut.
Lichen candicans, Dicks. Crypt. 3, 15 ;
Engl. Bot. 177S.
Lichen epigeus, Persoon in Ulst. Ann. 7,25.
Parmelia epigen, Achar. Mcth. 191.
Lecanora epigea, Achar. Lich. 4i'2.
On the ground among the mosses on rocks.