LECIDEa] LECIDEACEiE 27 



Differs in the thicker more developed thallus and the constantly 

 darker apothecia, which are usually several confluent and irregular. 



Hab. On peaty soil in mountainous regions. — Distr. Seen only 

 from N. England and the Grampians, Scotland. — B. M. Ayton Moor, 

 •Cleveland, Yorkshire ; Eglestone, Durham ; Ben Lawers and Rannoch 

 ]Moor, Perthshire ; Ben Avon and Cairngorm, Braemar, Aberdeenshire. 



28. L. flexuosa Nyl. in Mem. Soc. Cherb. v. p. 121 (1857).— 

 Thallus effuse, thin, granulose, greenish or greyish-green (Kf -f- 

 yellow, CaCl + reddish), at times subevanesoent. Apothecia 

 small, sessile, plane, black or blackish, whitish within, the 

 margin thin, paler, often flexuose ; hypothecium colourless ; para- 

 physes brownish at the apices ; spores ellipsoid, minute, 0,007—9 

 mm. long, 0,0035-45 mm. thick; hymenial gelatine pale-bluish 

 then tawny-reddish with iodine. — Mudd Man. p. 196; Leight. 

 Lich. Fl. p. 260 ; od. 3, p. 256. L. decolorans subsp. flexuosa 

 Cromb. Lich. Brit. p. 66 (1870). Biatora flexuosa Fr. in Vet. 

 Ak. Handl. 1822, p. 268 (nomen) & Sched. Grit. viii. p. 11 (1826). 



Exsicc. Cromb. n. 80; Larb. Lich. Hb. n. 341. 



Very much resembles some lignicolous states of the preceding, of 

 which it may be only a subspecies. It differs, however, in the con- 

 stantly darker apothecia and more especially in the much smaller 

 spores. The British specimens seen are well fertile. 



Hab. On old pales and stumps of trees, chiefly larch, in upland 

 wooded districts. — Distr. Rather local, though plentiful . where it 

 occurs, in Great Britain ; not seen from Ireland. — B. M. Near Ulla- 

 combe, Bovey Tracey, Devon ; Bardon Hill, Leicestershire ; Haugh- 

 mond Hill, Shropshire ; Lounsdale, Cleveland, Yorkshire ; Teesdale, 

 Durham ; Glen Falloch, Craig Calliach, and Achmore, Killin, Perth- 

 shire ; Countess wells Woods, near Aberdeen. 



Form aeruginosa Leight. Lich. Fl. p. 260 (1871) ; ed. 3, 

 p. 256. — Thallus leprose-pulverulent, dark verdigris-green; other- 

 wise as in the type. — Lecidea eeruginosa Borr. in Engl. Bot. 

 Suppl. t. 2682 (1831); Hook, in Sm. Engl. Fl. v. p. 181. 

 L. flexuosa var. ^ seruginosa Mudd Man. p. 197 (1861). 



Exsicc. Leight. n. 406 ; Larb. Lich. Hb. nos. 65, 66. 



Differs merely in the thalline granules becoming dissolved into an 

 aeruginose powder. It often occurs sterile and might then be taken 

 for a Lepraria. 



Hab. On old pales and on the bark of old trees in upland wooded 

 situations. — Distr. Not uncommon throughout England ; rare in S. 

 Ireland; not seen from Scotland. — B.M. Highbeech, Epping Forest, 

 and Chelmsford, Essex ; near Mill Hill, Middlesex ; Leith Hill, Surrey ; 

 Cuckfield and Henfield, Sussex ; Lyndhurst, New Forest, Hants ; 

 Ullacombe, near Bovey Tracey, Devon ; near Virginia Water, Berks ; 

 Brabaham Park, Cambridgeshire ; North Wootton, Norfolk ; Goyt 

 Bridge, near Buxton, Derbyshire ; Twycross, Leicestershire ; Batten- 

 hall, Worcestershire ; Morda, Oswestr}' , Shropshire ; Ba^'sdale, Cleve- 

 land, Yorkshire ; Glenmire, Cork. 



