468 115. Lecidea. 4. CENOTHALAMER:. Pl, cell. aph. 
Lichen pruinosus, Achar. Prod. 77; Engl. Bot. 2244, 
_ lichen pruinatus, Dickson Crypt. 3, 15 
~Verrucaria albo cerulescens, Hoffm. Germ. 189. 
‘Lecidea pruinosa, Achar. Meth. 55, 
Lecidea albo-ceerulescens, Achar, Lich. 188. 
On rocks and stones. 
Thallus varies according to the age of the plant, cracked, 
smooth, powdery, or even 0; and in colour white, grey or 
rust-colour. 
22. Lecidea abietina. Fir lecidea. 
Crust spreading, very thin, smooth, ereenish grey; apo- 
thecia nearly sessile, flat, black, grey hoary ; edge raised, 
swollen. 
Lithen abietinus, Achar. Prod. 57; Engl. Bot. 1682. 
Lecidea abietina, dchar. Lich. 188. 
On the bark of fir-trees, and the dead wood. 
23, Lecidea speirea. Veiled lecidea. 
Crust tartarlike, not broken, very white; apothecia sessile, 
thick, black with a white hoariness, bordered, afterwards 
convex, naked, frequently surrounded with a thalloid base 
inside black a a greyish bed under the centre. 
Verrucaria calcarea? Hoffm. Germ. 135. 
Lichen rimosas, Dickson Crypt. 1,12; Engl, Bot. 1736. 
Lichen speireus? Engl, Bot. 1542. 
Lecidea amylacea speirea, Wahlenb. Lapp. 476. 
Lecidea speirea, Achar. Meth, 52; Lich. 184, excl, var. 8. 
On stones and rocks. 
24. Lecidea margaritacea. Pearly lecidea. 
Crust tar tarlike, not broken, whitish green marked with 
black; apothecia minute, sunk then rising up, sessile, thick, 
with a white hoariness, inside black; border swollen. 
Lecidea margaritacea, Achar. Lich. 135, 
On rocks. é 
925. Lecidea epipolia. Wall lecidea. 
Crust tartarlike, spread regularly, cracked in beds, 
white; beds swollen, rough; apothecia sessile, hemispheri- 
cal, ereyish hoary ; inside black, edge of the base thin, 
persistent. 
Lichen niveo-ater, Dickson Crypt. 4. 
Lichen epipolius, Engl. Bot. 1137. 
Lecidea epipolia, Achar. Meth. 653 Lich. 186. 
On walls and stones. 
