Mr. Hardy on Lichens of the Eastern Borders. 403 



Island." J. V. Thompson. B. " Lamberton Moor." Dr. Johnston. Occasion- 

 ally on dikes at Penmanshiel, and Oldcambus. 



2. B. HispiDA, Dill. On trees, rocks, and old walls, common. " Whitest 

 on the sloe." Dillenuis. 



3. B. ciEsiA, Hoffm. On walls, roofs of houses, stones near water, and in 

 channels of streams, generally diffused, N. and B. 



3. TRiBACEA, Ach. Overrunning mosses and Jungermanniaj, on the trunk of 

 an ash-tree in a dean on the College, below Heathpool linn. It agrees with 

 specimens from the Rev. T. Salwey. See his remarks on this plant in his 

 " Observations on Penzance Lichens," p. 146. 



</. ALBiNEA, Ach. Some plants closely approaching to this state grow on the 

 wall-top of the sea-bank near Siccar-point. 



4. B. STELLARis, L. Trunks and branches of trees, common. 



5. B. OBSCURA, Ehrh. Tops of stone walls and on rocks, not very common. 

 N. Between Budle and Bamborough, and near Bamborough Castle and village ; 

 wall near Yeavering ; and Whiteside hill. B. Walls near Penmanshiel, and 

 Siccar point ; rocks near St. Helen's Church, in Dowlaw dean, and near the 

 Retreat. 



6. B. PULVERULENTA, Schreb. On very old trees, especially those about 

 villages, and old onsteads, and occasionally on old stone walls. On some old 

 ash trees on Spindleston-heugh it is so degenerate as to appear like a diminu- 

 tive Lecanora with a green thallus. 



7. B. AQUiLA, Ach. On rocks not far from the sea, along the whole coast 

 from Cockburnspath Cove to Bamborough. Inland on rocks at Sweethope 

 and Hairy-heugh. Bcv. Thomas Broien. [Minto Crags, Roxburgh, A. Jerdon, 

 Esq.l ; N. Spindleston-heugh ; Chester hill Crags ; near Humbleton Mill. 



23. Physcia, Schreh. 



1. p. PARiETiNA, L. Stone walls and rocks, common ; also on trees, &c. 

 The rocks about St. Abb's Head, where exposed to the sea, are quite green with 

 this, and states of Placodium murorttm, of both of which it may be said in the 

 language of Schaerer, " Thalli color pro situ aprico vel nmhroso intcnsior velpal- 

 lidior et magis viridis." The leprcse state is Lepraria viridis according to 

 Schaerer, who gives definitions of 14 varieties, Enumeratio Lich. Europ. p. 

 49—51. 



24. G-yropliora, Ach. 



1. G. POLYPHYLLA, L. On exposed mountain rocks, and stone walls. N. 

 Summit of Cheviot and Hedgehope, and of Newton Tor ; also on Fredon hill or 

 Watch Law, Homilheugh, House of Crag, Henhole, the Bizzle, &c. B. *' Near 

 Abbey St. Bathan's." Bev, Thomas Broiim. Twinlaw Cairn, stone-walls near 

 the site of St. David's Cairn, at Penmanshiel, and in Bowshiel dean ; rocks at 

 Dean's Castles, Oldcambus, Edin's Hold. Never in fruit. 



2. G. EROSA, Weler. On mountain rocks and stones. N. " On Cheviot and 

 Hedgehope." Winch. Near the summits of Cheviot and Hedgehope with 

 spermogenes and apothecia ; also at the apex of Newton Tor. B. A single 

 plant, bearing apothecia, on a stone wall, in the upper part of Bowshiel dean, 

 a remarkably low habitat for this Alpine species. 



