Pl.cell.aph. 4. CENOTHALAMEZ:. 91. Stereoc. 411 
A. Bmomycipem. Apothecia nearly round, not bor- 
dered, piaced upon a solid podetium. 
Ber git STEREOCAULON. Schreber. Siereocaulon. 
Thallus cartilaginous, rather woody, branched, shrub- 
like, bark unequal; apothecia topshape, sessile, solid, flat 
at top, bordered, becomes hemispherically convex; proli- 
gerous fiake thick, covering the apothecium at top, flat, 
girt nearly equally with a border formed of the thallus, 
then dilated, convex, covering the border, turning over, 
coloured ; inside similar, slightly streaked. 
1. Stereocaulon paschale. Easter stereocaulon. 
Thallus greyish green, branched, granulated, fibrilled ; 
branches crowded, much divided, short; apothecia scattered, 
terminal, becoming convex, conglomerated, blackish 
brown. ; 
’ Lichennides non tubulosum cinereum ramosum totum crustaceum, Rait 
Syn. 66, 11. 
Lichen paschalis, Zin. S. P. 16213; Engl. Bot. 282. 
Beomyces paschalis, Wahlenb. Lapp. 450. 
Corallinoides paschale, Hoffm. Lich. 25. 
Stereocaulon paschale, Achar. Meth. 315; Lich. 581. 
On dry hills and rocks on mica or lava. 
2. Stereocaulon nanum. Dwarf stereocaulon. 
Thallus white, greyish, very slender, thread, branched ; 
branches nearly even-topped, flocky, powdery ; apothecia la- 
teral, crowded, convex, black brown. 
Lichen quisquiliaris, Leers Fl. Herborn, 993. 
Lichen nanus, Achar. Prod. 206. 
Stereocaulon quisquilare, Hoffm. Germ. 130. 
Stereocaulen nanum, Achar. Meth. 515; Lichen. 582. 
On the ground, in rocky countries. 
Tufts a quarter of an inch high. 
II]. 92. ISIDIUM. Acharius. - Isis- lichen. 
Thallus crustlike, flat, expanded, adnate, uniform; po- 
detia solid, fertile, rather short; apothecia round, convex, 
growing nearly globular, solid, sessile on the top of the 
podetia; proligerous flake included in the tip of the podetia, 
girt with a border formed of them, convex above, flat be- 
neath, coloured, afterwards prominent, bordered, hemi- 
spherical; inside similar. 
