30 LECANO-LECIDEEI [lECIDEA 



atrorufum S. F. Gray Nat. Arr. i. p. 4G1 (1821). Psora atrorufa 

 Hook* ill Sni. Engl. Bot. v. p. 192 (1833) ; Mudd Man. p. 171. 



The thiilhis, which varies somewhat in colour according to situa- 

 tion, heconies in age more verrucose in the centre. The apothecia, 

 usually somewhat scattered, are occasionally here and there confluent 

 and difform. 



Hah. On peaty and gravelly soil, very rarely on naked schistose 

 boulders in mountainous regions.- -Dis^?'. Only in N. England, Wales, 

 and on the Grampians, Scotland; not certainly found in Ireland, 

 though reported from co. Wicklow. — B. M. Cader Idris and Rhinog 

 Each, Merioneth ; Snowdon, Carnarvonshire ; Farndale Moor, York- 

 shire ; Stavely Head, Westmoreland ; Teesdale, Durham ; Ben 

 Cruachan, Argyll ; Ben Lawers, near Loch Ericht and Craig Calliach, 

 Perthshire ; Lochnagar, Ben-naboord and Ben Macdhui, Braemar, 

 Aberdeenshire ; Ben Nevis, Invernessshire. 



33. L. uliginosa Ach. Meth. p. 43 (1803) (excl. vars.) & 

 in Vet. Ak. Handl. p. 262 (1808).— Thallus effuse, thinnish, 

 minutely gratiulose, subleprose, brownish or brownish-black 

 (K — , CaCl — ) ; hypothallus blackish. Apothecia minute, plane 

 or somewhat convex, brownish-black or blackish, within blackish 

 (slightly greyish in the middle), the margin thin, paler, evanescent ; 

 paraphyses indistinct ; hypothecium brown ; spores ellipsoid, 

 0,008-17 mm. long, 0,004-8 mm. thick; hymenial gelatine 

 bluish then tawny-wine-coloured with iodine.— S. E. Gray Nat. - 

 Arr. i. p. 467; Hook, in Sm. Engl. El. v. p. 179; Tayl. in 

 Mackay El. Hib. ii. p. 124; Mudd Man. p. 197 pro parte; 

 Cromb. Lich. Brit. p. 67 pro parte ; Leight. Lich. El. p. 274 

 pro parte ; ed. 3, p. 274 pro parte ; Cromb. in Grevillea xxii. 

 p. 9. Lichen uliginosus Schrad. Spicil. p. 88 (1794); Engl. Bot. 

 t. 1466. 



Exsicc. Leight. nos. 120, 354 ; Mudd n. 167 ; Cromb. n. 82 ; 

 Larb. Lich. Hb. nos. 225, 265 ; Johns, n. 372. 



Often spreads very extensively on moors, like L. granulosa, and 

 in dry weather is scarcely distinguishable from the substratum. In 

 moist shady situations the thallus is at times greenish and sub- 

 gelatinose with paler apothecia ; these are numerous, often crowded 

 and confluent, becoming in age convex and here and there several 

 aggregate. 



Hab. On turfy, rarely sandy soil and mossy stumps of trees, chiefly 

 firs, in upland and subalpine localities. — Distr. General and common 

 in most parts of Great Britain and no doubt also of Ireland {fide 

 Tayl. I. c.) though seen from only a single locality there. — B. M. 

 Hayle, Cornwall ; Epping Forest and Galleywood Common, negir 

 Chelmsford, Essex ; Reigate Hill, Surrey ; near Lyndhurst, N.ew 

 Forest, Hants ; Dartmoor, Devonshire ; Roaghton, Cornwall ; Broad- 

 water and Tilgate, Sussex ; North Wootton Common, Norfolk ; Goyt 

 Lane, Buxton, Derbyshire ; Malvern Hills, Worcestershire ; Cader 

 Idris, Merioneth ; Wrekin Hill, Stiperstones, Haughmond Hill and 

 Gruis Hill, Shropshire ; Bowdon Heath, Cheshire ; Kildale Moor, 

 Cleveland, Yorkshire ; Teesdale, Durham ; Windermere, Westmore- 

 land ; The Cheviots, Northumberland ; Pentland Hills, near Edin- 



