112 



LICHENACEI. 



[B^OMTCES. 



This is at once distinguished by the colour and form of the apothecia 

 and by their internal structure. The thallus, when sterile, often spreads 

 extensively, and is then more continuous and aspersed with large rosy- 

 white or white cephalodine granules, when it is Variolaria terricola Tayl. 

 in Mack. Fl. Hib. ii. p. 115. The apothecia are not common in this 

 country ; but the spermogones are frequent on otherwise barren thalli. 

 They are somewhat large, tuberculiform, at first covered by the cortical 

 layer, the conceptacle blackish above, with elongate jointed sterigmata 

 and straight sperniatia 0,005 mm. long, scarcely 0,001 mm. thick. 



Hob. On sterile gravelly or turfy soil on upland moorlands. Distr. 

 General, though not common in a fertile state, in most of the moun- 

 tainous and more hilly tracts of Great Britain and Ireland. B. M. : 

 Suffolk ; Epping Forest, Essex ; Toy Hill, Kent ; Lyndhurst Moor, 

 Hants ; St. Breock Down and Tregawn, Cornwall ; Montgomeryshire ; 

 Cader Idris, near Barmouth, and Aberdovey, Merionethshire ; Wapley 

 Hill, Herefordshire ; Cleveland, Yorkshire ; the Cheviots, Northumber- 

 land. New Galloway, Kirkcudbrightshire ; Leadhills, Lanarkshire ; 

 Achosragan Hill, Appin, Argyleshire ; Sheriffmoor, Stirling ; Glen 

 Lochay, Ben More, Craig Tulloch, and Ben Lawers, Perthshire; Baldovan 

 Woods and Sidlaw Hills, Forfarshire ; Glen Dee, Braemar, Aberdeen- 

 shire ; Glen Nevis, Inverness-shire. Near Clonmel, Co. Tipperary. 



B. ICMADOPHILA (Trevis. in Mass. Rich. (1852) p. 26). Apo- 

 thecia sessile, lecanoroid, at length biatorine, solid within. 



Fig. 31. 



Baomyces teruginosus DC. a. Section of an apotheciurn (in dry state), XSO. 

 b. Two thecse and a paraphysis, x3f>0. c. Spores, X500. d. Section of a 

 sperrnogone, X30. e. Sterigmata and spermatia, X500. 



