Mr. Hardy on Lichens of the Eastern Borders. 407 



0. ACRTJSTACEA, Scliaer. N. Cheviot, Routin Linn, &c. B. BowsHel dean, 

 moor at Dowlaw, &c. 



7. ALPiGENA, Ac7i. N. About the summits of Cheviot and Hedgehope. 

 S, coNGLOBATA, Fries. N. On Easington rocks. 



£, INTRICATA, Schrad, On stone-walls and stones. N. Cheviot ; Spindle- 

 ston. B. Penmanshiel ; Bowshiel dean, &c. ; in the latter place parasitic on 

 the thallus oi Rhizocarpon gcographiciim. 



8. L. SULPHUREA, Hoffm. On exposed rocks and stone-walls ; not uncom- 

 mon. It gives a green shade to the face of the rocks at Spindleston ; in shady 

 situations the thallus is almost yellow. A species that loves the blast. 



9. L. GLAUCOMA, Ach. On hard rocks and stones in exposed upland places. 

 N. Cheviot, Homilheugh, Spindleston, Bamborough, &c. B. Penmanshiel, 

 Dowlaw dean, Oldcambus, &c. 



(3. SUBCARNEA, Acli. On sandstone at Cockenheugh and on the sea-cliffs 

 near Scremerston, porphyry at Fredon hill, and trap at Budle. 



We may have L. Stenhammari of Fries also, or at least a state of //. glau- 

 coma, with a black hypothallus, (for in that species it is white,) which appears 

 as a black rivulose line where patches meet on stones encrusted by this lichen ; 

 the whole stone being sometimes occupied by a map-like net work. Jn very 

 exposed situations this hypothallus as well as the innate concave abortive 

 Lecidea-like apothecia, and the numerous spermogones, are of a pale blue. 

 This state is best to be seen in Dowlaw dean, and Edmonds dean, both liable to 

 many a bitter gale. Fries, and the generality of writers on lichens, reckon 

 Isidium corallinuvi, L., as a variety of this species. 



10. L. COARCTATA, Ach. a.. ORNATA, Somvif. N. On stones and on the 

 ground, on the Lill-burn. B. On the earth beneath the cope of stone-walls, 

 near St. David's cairn, plentiful. This is a fine thing, very unlike the next 

 variety, and more resembling Psora atro-rufa or Lecidea decoloraiis. 



S. ELACisTA, Ach. Sandstone, greywacke, and other rocks and stones in a 

 crumbling state. Not uncommon on field-stones, N. and B. ; best seen, in 

 winter and spring. 



Fries spent several weeks in the study of this lichen, " omnhim maxime versi- 

 formis." Fries, Lichenog. Europ. Ref. p. 105. 



11. L. PALLESCENS, L. a. Parella, Z,. Common on exposed stones, rocks, 

 and stone-walls. 



0, TUMiDULA, Pers. On old ash and oak trees ; common. 



<y. TuRNERi, Sm. B. At the base of old oak and birch trees, Penmanshiel 

 Wood. 



If Variolaria lactea is the sorediated crust of this species as Koerber intimates, 

 and as appears likely, it occurs on rocks on Care-burn, and an Harelawside dean. 



12. L. TARTAREA, L. On mountain rocks, N. and B. Large sheets of it 

 grow on some of the crags and rocky scaurs on Cheviot. 



(3. ARBOREA, D. C. A very pretty state with minute concave apothecia 

 growing on stems of heath, on Coldinghara moor, arranges better here than with 

 frigida. 



7. FRIGIDA, L. Encrusting mosses, &c. N. Summits of Cheviot and Hedge- 

 hope. B. Coldingham moor. 



2 D 



