178 LICHENES. [Lecidea. 



miscella, Ac/i. Syn. p. 21 ?) — Patellaria contigua, Hoffm. PL 

 Lich. 



On whin-stone rocks, Durham, Rev. Mr. Haniman. — Mr. Borrer 

 probably considers the Lecidea miscella of Acharius, as different from 

 the Lichen miscellus E. Bot., since he does not notice it under that 

 plant : yet Sir Jas. E. Smith says that Mr. Harriman's specimens were 

 pronounced by Acharius to be the same. 



22. L. geographica, (Map Lecidea'); crust bright-yellow 

 smooth cracked and tessellated with a black margin and black 

 between the areola?, apothecia nearly flat and irregular often 

 confluent even with, the crust black throughout. — Lichen geo- 

 graphicus, Linn. Sp. PL p. 1607. E. Bot. t. 245. — L. atro-virens, 

 Linn. Sp. PL p. 1607. — Lecidea atro-virens, var. b. geographica, 

 Ach. Syn. p. 21.— Dill. Muse. t. 18./. 5. 



On rocks and stones, chiefly of trap-formation, in subalpine and 

 especially mountainous countries. — It seems to be generally allowed 

 that the Lichen geographicus and atro-virens of Linn, constitute one 

 species ; and surely the former name, so expressive of its character, is 

 the one to be preferred. 



23. L. sildcea, Ach. (yellow ochrey Lecidea); crust uneven 

 tessellated yellowish-red, apothecia sessile black with a narrow 

 black border at length convex often confluent. — Ach. Syn. p. 22. 

 — Lichen silaceus, E. Bot. t. 1118. 



On rocks, frequent. 



24. L. (Ederi, Ach. ( Oederian Lecidea); crust thin tessel- 

 lated of a rusty red, apothecia minute somewhat globose a little 

 immersed concave black with a thick black border. Sm. — Ach. 

 Syn. p. 22. — Lichen CEderi, E. Bot. t. 1117. — L. ccesius, Dicks. 

 Cr. Ease. 2. p. 19. t. 6.f. 6.— L. Dicksoni, With. — Urceolaria 

 (Ederi, Schcsr. Lich. Helv. p. 69. n. 123. 



Kocks, in the north of England and Scotland. — This differs from the 

 preceding in its deeper colour, and in its more numerous and smaller apo- 

 thecia with their broad border. Mr. Schaerar considers it to be a true 

 Urceolaria. 



25. L. flavo-virescens, Borr. Mss. {Lemon-coloured Lecidea); 

 crust leprous granulated friable lemon- coloured, apothecia black 

 globose solitary or aggregated. Sm. — Lichen Jlavo-virescens, 



Dicks. Cr. Ease. 3. p. 13. t. S.f. 9 Lecidea citrinella, Ach. Syn. 



p. 25 Lichen citrin., E. Bot. t. 1877. 



On the ground, in sandy places. 



26. L. scabrosa, Ach. Meth. {rugged-shielded Sulphur Lecidea); 

 crust powdery pale yellowish-green, apothecia sunk in the crust 

 aggregate black with an elevated black border. Sm. — Lichen 

 scabrosus, E. Bot. t. 1878. — Lecidea citrinella, (3. scabrosa, Ach. 

 Syn. p. 25. 



On tiled roofs and on flints, in Sussex, Mr. Borrer. — This has a 

 great affinity to the last, with which Acharius and Wahlenberg join it : 

 its crust is " thinner, of a paler green, more truly powdery and less gran- 

 ulated ; the apothecia are sunk, so as to be on a level with the crust, and 

 they have a thick border." 



