184 LICHENES. [Lecidea. 



54. L. ferruginea, (rusty '-shielded Lecidea); crust spreading 

 thin rugged greyish-white, apothecia rusty-orange at length 

 convex with a waved border of the same colour. — Lichen 



ferrugineus, Huds. Angl p. 526. E. Bot. t. 1650 — Lecanora 

 cinereofusca, Ach. Syn. p. 43 — L. ccesio-rufa, Ach. Syn. p. 44. 

 On rocks and stones, and on the bark of trees. 



55. L. subcarnea, Ach. (flesh-coloured fruited Lecidea); crust 

 tartareous subdeterminate cracked white, apothecia flesh-col- 

 oured at length convex conglomerate distorted the disk smooth 

 pruinose the border naked prominent. Ach. Syn. p. 45. 



Rocks, Scotland, Mr. Dickson in Mr. Borrer's Herb. 



56. L. icmadophila, Ach. (Heath Lecidea); crust leprous un- 

 equal granulated greenish-white, apothecia nearly sessile plane 

 flesh-coloured at length flexuose and the disk wrinkled with an 



obsolete border. Ach. Syn. p. 45 Lichen icmadophila, Linn. 



Suppl. p. 450. — Lichen ericetorum, Ehrh. — E. Bot. t. 372. 



Turfy places, under the shade of heath, frequent. — Linnaeus con- 

 founded this with the Bceomyces roseus, which the apothecia somewhat 

 resemble in size, as they and the crust do in colour. 



57. L. privigna, Ach. Meth. (obsolete-crusted Lecidea); crust 

 scarcely any, apothecia sessile concave olive-brown with a 

 thick elevated border darker than the disk. — Ach. Meth. p. 49. 

 — Lecanora milvina, {3. privigna, Ach. Syn. p. 151 — Lichen sim- 

 plex, E. Bot. t. 2152, (the figure on sandstone.) 



On white sandstone, Durham, Rev. Mr. Harriman. — This I am 

 only acquainted with from the figure in E. Bot. For the synonyms I 

 stand indebted to Mr. Borrer. 



58. L. marmorea, Ach. (salmon-coloured Lecidea^); crust pale 

 thin scattered, apothecia subglobose salmon-coloured at length 

 urceolate with a very thick elevated inflexed pale flesh-coloured 

 often crenate border sometimes a little pulverulent. — Ach. Syn. 



p. 46 Lichen marmoreus, Dichs. Cr. Ease. 2. p. 18. E. Bot. 



t. 739.— L. cupularis, Hedw. St. Cr. v. 2. p. 58. t, 20. /. B.— 



L. tricolor, With Gycdecta cupularis, ScJicer. Lich. Helv. p. 79. 



n. 135. 



On rocks, especially schistose and calcareous, often spreading over de- 

 cayed mosses, chiefly in subalpine countries. 



59. L. alahastrina, Ach. (Alabaster Lecidea); crust thin 

 smooth and subpruinose white and subglaucescent, apothecia 

 plano-convex entire of the same colour as the crust the disk 

 whitish rose-colour. Ach. Syn. p. 46. — Lichen rosellus, E. Bot. 

 *. 1651? 



Trees, New Forest, Hants, Miss Biddulph. Scotland, Mr. D. Turner, 

 (if L. rosellus, E. Bot. be the same).— This is as unknown to me 

 as it is to Mr. Borrer, who, however, observes that Acharius appears to 

 have had it from England ; and that he regards the Lichen rosellus of 

 E. Bot. as a doubtful specimen of the same plant. 



