398 Mr, Hardy on Lichens of the Eastern Borders. 



B. coRYMBiFORMis. N. March fence behind the Sneer-hill. Sub-vars. C. filt- 

 FORMis, Relhan, and D. obtusa, Schaer. N. Whitsunbank hill, Ford-hill. B. 

 Cockburnlaw, Coldingham Moor. 



The diversities in the species of this genus are multiform. Linnaeus, Flor. 

 Lapp. p. 246, humourously recommends the student of its varieties to go to 

 Lapland. 



9. Baeomyces, Pers. 



1. B. Byssoides, L. On earth on old roads in woods, on old sod-laid wall- 

 tops, on moors, and sometimes on stones, common. Koerber says the dusty 

 dissolved sterile thallus forms " Lepraria incaiia." (Syst. Lich. Germ. p. 374.) 



2. B. ROSKUS, Pers. On wet high peaty soils. N. On Cheviot in ascending 

 from the Henhole. B. Moor at Penraanshiel ; near Quixwood ; Monynut hill or 

 Laughing Law, &c. 



10. IcmadopMla, Ehrh. 



1. L iERUGiNOSA, Scop. Moist peaty moors. N. Cheviot on the ascent 

 where the Cloudberry commences, and on the summit ; Hedgehope ; back of 

 Newton Tor. B. Coldingham Moor, moor near Quixwood, &c. 



11. Stereocaulon, Schreh. 



1. S. PASCHALE, L. var. 7. Alpinum, Laur. Among rocks and moss, near 

 the summit of Cheviot and Hedgehope, and Newton Tor. "With apothecia on 

 Hedgehope. 



2. S. CONDENSATUM, Hoffm, On old roads on moors, worn down to the 

 gravel. Near Quixwood, the Blakelaws, and Oldcambus moss ; Black Craig, 

 Pease dean. " The thallus (i. e. the stipes,) often fails, in which case the apo- 

 thecia, unless they are absent, are adnate on the thick crustaceous protothallus, 

 which is often transpierced by parasitic Ephebe threads. Such forms promise, 

 as Schaerer had previously indicated, an obvious resemblance to Lecidea sabule- 

 torum." Koerler, Syst. Lich. Germ., p. 13. Black parasites appear on the 

 crust of our specimens, and look like apothecia till the lens is applied, but when 

 moistened they are seen to be a Tremella and not an Ephebe. 



3. S. NANUM, Ach. Rare. N. On clay in the fissures of rocks above Cold- 

 gate Mill. B. Head of Dowlaw dean. 



12. TJsnea, Dill. 



1. U. BARBATA, L. «. FLORIDA, L. On trunks and branches of old trees, par- 

 ticularly pine-trees and birches ; fructifying finely on the latter in Penmanshiel 

 Wood. 



B. HIRTA, L. " Banks below Marshall Meadows." J. V. Thompson, Ber- 

 Plants, p. 111. " On rocks " there. Herh. Johnston. 



On the moor near DoAvlaw this species appears to spring immediately from 

 the peaty soil, but on examination it will be found to be parasitic on minute 

 fragments or stems of heather. 



13. Alectoria, Ach. 



1. A. JUBATA, L. On trunks and branches of old trees, common. 



0. CHALTBEiFORMis, L. On rocks and wall-tops. N. Cheviot, Hedgehope, 



