Pl. cell. aph. 4. CENOTHALAME, 115. Lecidea. 469 
26. Lecidea corticola. Bark lecidea. 
Crust rather tartarlike, granularly bedded, rough, very 
white; apothecia small, slightly sunk, grey hoary, growing 
globular, not bordered, naked, black; inside greyish. 
Licken corticola, Achar. Prod. 57; Engl. Bot. 1892, 
Lichen albo-ater, Earh. Crypt. 176. 
Lichen amylaceus, Ehrh. Crypt. 303. 
Verrucaria albo-atra, Hoffm Germ. 193. 
Lecidea corticola, Achar. Meth. 53; Lich. 186. 
On the bark and trunks of trees. 
d. Apothecia brown-black, brownish, or inclining lo brown. 
27. Lecidea Lightfootit. Lightfoot’s lecidea. 
Crust rather spreading, granulated, greenish. grey; apo- 
ithecia pressed close, flat, brown black, inside dirty white; 
edges thin, winding, paler than the center. 
Lichen Lightfootii, Engl Bot. 1451. | 
Lecidea Lightfootii, 4char. Lich. 177. 
On the bark of birch trees. 
28. Lecidea fuscata. Embrowned lecidea. 
Crust leprous, rather powdery, blackish brown; apothecia 
bordered, dark red, when old blackish. 
Lichen fuscatus, Lamarck Encycl. 
- Lecidea obscura, Achar. Meth. 75. 
Lecidea fuscata, Achar. Lich, 211. 
On stones. 
29. Lecidea quernea. Oak lecidea. 
Crust leprous, granular powdery, pale yellowish brown; 
apothecia rather sunk, afterwards convex, not bordered, 
brown and black. 
Lichen querneus, Dickson Crypt.1,93 Engl. Bot, 485, 
Lecidea quernea, char. Meth. 62; Lich. 202. 
On the clefts of the bark of old oaks, and on other lichens. 
30. Lecidea viridescens. Greenish lecidea. 
Crust thin, granulated floury, coppery green; apothecia 
convex, wrinkled, irregular, confluent, brown-black. 
Lichen viridescens, Schrad. Germ. 1,883 Engl. Bot. 2217, 
Lecidea viridescens, Achar. Meth. 62; Lich. 200, 
Lecidea hypnophyla, Winch 2, 37. 
On ruins, and decayed mosses. 
