2. L. verruculosa.
Lichen verrucidosus, Eng. Bot. 2317.
Upon fine-grained Sandstone on Muggleswick Fell, D.
3. L. fusco-atra.
Ach. Syn. 12; Gr. Fl. Eds. 324; L. dendritica, Northumberland and Durham Guide, ii. 33 and 112; Lichen dendriticus Eng. Bot. 1734.
On fragments of Quartz in the Millstone grit in Weardale and Teesdale, D. On Shaftoe Crags, N., upon the same kind of rock.
L. fusco-atra, L. atro-alba, Lichen acrotellus, Eng.
Bot. 1712, and L. fimbriates, Eng. Bot. 2438, are probably modifications of the same species. It grows very elegantly on the smooth rocks of white Quartz in the Highlands of Scotland.
4. L. fumosa.
Ach. Syn. 12; L. cechumena, Ach. Meth. 42; L. anthroocarpa, Northumberland and Durham Guide, ii. 33; Lichen anthroocarpus, Eng Bot. 1829; L. cechumenus, Eng. Bot. 1830.
On Sandstone in Charnberry Gill near Eglestone, and on rocks in Horsley Hope Dene, D. On Basalt upon Cronkley Fell, also on the fell above Holwick, Teesdale; first discovered by the Rev. John
Harriman. On Cheviot and Hedgehope, N.
5. L. lapicida.
Ach. Syn. 13; Lichen contiguus, Eng. Bot. 821.
Jn Cawsey Dene, and on Gateshead Fell; also on walls at Barnardcastle, D. On Gunnerton Crags near Barwesford, N.
6. L. petraea.
Ach. Syn. 15; Gr. El. Eds. 324; Berwick Flora, ii. 87; Lichen concentiricus, Eng. Bot. 246
On Sandstone rocks near Eglestone, and in the neighbourhood of Gainford, also in Cawsey Wood, D. On Gunnerton Grags near Barwesford, and in Heaton Dene, N.
7. L. confluens.
Ach. Meth. 16; Berwick Flora, ii. 86; Eng. Bot. 1964.
β L. pilularis.
On Sandstone rocks in hilly situations.
8. L. parasema.
Ach. Syn. 17; Gr. Fl. Eds. 325; Berwick Flora, ii. 87; Lichen parasemus, Eng. Bot. 1450.
On the bark of trees common.
9. L. sanguinaria.
Ach. Syn. 19; Berwick Flora, ii. 86; Lichen sanguinarius, Eng. Bot. 155.
On stones upon Gateshead Fell, and on stones, decayed mosses, and old trees, in the neighbourhood of Eglestone, D. On Hedgehope and Cheviot, N. On Murton Crags, N. — Dr. G. Johnston.
The circumstance on account of which the name sanquinaria is given, is a disease to which several Lichens are subject, and some that one would not certainly suspect; as, for instance, Lecidea muscorum and Parmelia quadricolor; and it is not confined to the Apothecia only, the whole inside of the crust
is frequently diseased and becomes crimson. — Harriman.
10. L. sabuletorum β geochroa.
Ach. Syn. 20; Lichen muscorum, Eng. Bot. 626.
On decayed mosses at Fawdon Slate and near Hilton Castle, also in Teesdale Forest and Wearclale, D. On Gunnerton Crags, Cheviot, and Hedgehope, N.
11. L. miscella.
Ach. Syn. 21; Lichen mucellus, Eng. Bot. 1831; L. escharoides, Eng. Bot. 1257.
On Basaltic rocks near Winch Bridge and Whey Syke, in Harewood, on Teesdale Forest, also in Horsley Hope Dene, D.
12. L. atro-virens, and β geographica.
Ach. Syn. 21; Gr. Fl. Eds. 325; Berwick Flora, ii. 88; Lichen geographicus, Eng. Bot. 245.
On rocks and stones especially in the sub-alpine parts of Durham and Northumberland.
13. L. silacea.
Ach. Syn. 22; Lichen silaceus, Eng. Bot. 1118.
On rocks and stones in sub-alpine situations. On the Teesdale Moors, D. On Cheviot and Hedgehope, N.
14. L. Oederi.
Ach. Syn. 22; Gr. Fl. Eds. 325; Berwick Flora, ii. 88; Lichen Oederi, Eng. Bot. 1117; Lichen caesius, Dick. Crypt. Fasc. ii. 19, t. 6, f. 6; L. Dicksoni, Ach. Pred. 76.
On rocks in the sub-alpine parts of Northumberland and Durham, particularly on Basalt and Porphyry.
15. L. alba.
Ach. Syn. 24; Gr. Fl. Eds. 326; Lepraria alba, Eng. Bot. 1349; Byssus lacteus, Lightfoot, 1007.
On rocks and trees in the sub-alpine parts of Durham and Northumberland.
16. L. citrinella.
Ach. Syn. 25; β scabrosa, Lichen citrinellus, Eng. Bot. 1877; L. flavo-virescens, Dick. Crypt. Fasc. iii. 13, t. 8, f. 9.
On earth upon the tops of walls near Eglestone, D. First discovered by the Rev. J. Harriman.
17. L. uliginosa.
Ach. Syn. 25; Lichen uliginosus Eng. Bot. 1466.
On the heathy part of Prestwick Carr, and on Che-
viot, N. In boggy places near the Redheugh, and
near Eglestone, D.
18. L. immersa.
Ach. Syn. 27; Lichen immersus, Eng. Bot. 193; L. calcivorus, Ehrh. Cr. Ex. No. 244.
On the Magnesian Limestone, Durham, and on the Encrinal Limestone, D. and N. Ehrhart's name calcivorus is very appropriate.
19. L. rivulosa.
Ach. Syn. 28; Lichen rivulosus, Eng. Bot. 1737.
On Basaltic rocks in Horsley Hope Bourn, D. In Wooler Water at the foot of Cheviot, N.
20. L. albo-caerulescens.
Ach. Syn. 29; Lichen pruinatus, Dick. Crypt. Fasc. iii. 15, t. 9, f. 4; L. pruinosus, Eng. Bot. f. 2244.
On stone walls near Gainford, D. By the West Turnpike Road a mile and half from Newcastle.
21. L. abictina.
Ach. Syn. 30; Gr. Fl. Scot. 326; Lichen abietinus, Eng. Bot. 1682.
On old trees in Charnberry Gill near Eglestone, D. On fir trees beyond West Denton, N.
22. L. speirea.
Ach. Syn. 31; Lichen speireus, Eng. Bot. 1864.
On the Magnesian Limestone upon Cleadon, Boldon, and Fulwell Hills, D.
23. L. margaritacea.
Ach. Syn. 31; L. conspurcata, Berwick Flora, ii. 88; Lichen conspurcatus, Eng. Bot. 964; Loud. Ency. No. 15,406.
On the Magnesian Limestone, D. On Sandstone rocks at Hudshead, N. — Dr. G. Johnston.
