Pl. cell. aph. 4. CENOTHALAMES, 115. Lecidea. 467 
18. Lecidea uliginosa. Bog lecidea. 
Crust granulated, rather gelatinous, brownish green; 
apothecia pressed close, bordered, at last hemispherical, 
crowded, black; inside similarly coloured. 
Lichen uliginosus, Schrader Spicil. 88; Engl. Bot. 1466, 
Lichen humosus, Ehrh. Crypt. 135. 
Verrucaria uliginosa, Hoffm. Germ. 190. 
Verrucaria humosimilis, Hoffm. Germ. 190. 
Lecidea uliginosa, Achar. Meth. 43; Lich. 180. 
On the ground in turfy, bogey places. 
b. Apothecia black, naked, when moistened reddish or 
brownish. 
19. Lecidea immersa. Sunk lecidea. 
Crust spreading, thin, 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 immersuz, Schrad. Spicil. 1; Engl. Bot. 193. 
Lichen calcivorus, HArh. Crypt. 244. 
Verrucaria atrosanguinea, Hoffm, Germ. 192, ' 
Verrucaria immersa? Hoffm. Lich. 12. 
Lecidea immersa, char. 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. 
90. 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 rivulesus, Engl. Bot. 1737. 
Lecanora falsaria rivulosa, Achar. Lich. 358. 
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 allbo-cerulescens. Bluish-white lecideu. 
Crust tartarlike, contiguous, even, when old cracked, 
whitish; apothecia sessile and elevated, flat, black, with a 
bluish bleom ; border free, bent, naked, black. 
2H2Z 
