PI. cell. aph. 4. CENOTHALAMEiE. 115. Lecidea. 46? 
18. Lecidea uliginosa. Bog lecidea . 
Crust granulated, rather gelatinous, brownish green; 
apothecia pressed close, bordered, at last hemispherical, 
crow r ded, black ; inside similarly coloured. 
Lichen uliginosus, Schrader Spicil. 88 ; Eng!. Bot. 1466. 
Lichen huinosus, Ehrh. Crypt. 135. 
Verrucaria uliginosa, Hoffm. Germ. 190. 
Verrucaria humosimilis, Hoffm. Germ. 190. 
Lecidea uliginosa, Achar. Meth. 43; Lick. 180. 
On the ground in turfy, boggy places. 
b. Apothecia hlack, naked, when moistened reddish or 
brownish. 
19. Lecidea immersa. Sunk lecidea . 
Crust spreading, thiri, scarcely lobed, whitish ; apothecia 
plano-concave, sunk even into the stone, bordered, black ; 
centre rather hoary, when moistened very dark blood-red, 
at last slightly convex, inside whitish. 
Lichen immersus, Schrad. Spicil. 1 ; Engl. Bot. 193. 
Lichen calcivorus, Ehrh. Crypt. 244. 
Verrucaria atrosanguinea, Hoffm. Germ. 192. 
Verrucaria immersa ? Hoffm. Lich. 12. 
Lecidea immersa, Achar. Meth. 34 ; Lich. 153. 
On limestone. 
Thallus almost as hard as the stone itself, although per- 
fectly distinct; apothecia fall out in time, leaving their ca» 
vities in the thallus, which is very permanent. 
20. Lecidea rivulosa. Rivulet lecidea . 
Crust cracked in beds, brownish grey divided by black 
lines; apothecia sessile, flat, growing convex, bordered, ir- 
regular, black; inside whitish; when moistened brown. 
Lecidea rivulosa, Achar. Meth. 38. 
Lichen rivulosus, Engl. Bot. 1737. 
Lecanora falsaria rivulosa, Achar. Lich. 350. 
On quartz rocks. 
Thallus when moistened umber-brown ; apothecia when 
moistened brown in the centre, border keeps its own co- 
lour; small apothecia are scattered amongst the others. 
c. Apothecia black, greenish, grey , hoary. 
21. Lecidea albo-ccerulescens. Bluish-white lecidea . 
Crust tartarlike, contiguous, even, when old cracked, 
whitish; apothecia sessile and elevated, flat, black, with a 
bluish bloom ; border free, bent, naked, black. 
2 h 2 
