142 LECANO-LKCIDEEI [bILUIBIA 



18. B. Nitschkeana Lahm in Rabenh. Exs. no. 583 (1861).— 

 Thallus effuse, thin, leprose or granulose, greyish-green or 

 greenish-yellow (K— , CaCl — ), often nearly evanescent. Apo- 

 thecia minute, sessile or adnate, convex, immargiQate, pale-leaden- 

 brown or blackish ; hypothecium colourless ; paraphyses scanty, 

 flexuose, and branched, subdiscrete; spores oblong or fusiform- 

 ellipsoid, 3-septate, 0,012-20 mm. long, 0,003-4 mm. thick; 

 hymenial gelatine bluish then wine-red with iodine. — Lecidea 

 Nitschkeana Stiz. in Nov. Act. Acad. Leop.-Carol. xxxiv. Abh. 

 2, p. 70 (1867) ; Cromb. in Grevillea xxii. p. 58. L. ^ododes 

 Nyl. in Mora liL p. 410 (1869) ; Cromb. in Journ. Bot. viL p. 233 

 (1869) & Lich. Brit. p. 70 ; Leight. Inch. Fl. p. 261 ; ed. 3, p. 257. 



Hab. On old palings.— Di«fr. Eare in the South of England and in 

 ■Wales. — B. M. Lyndhurst, Xew Forest, Hants ; DolgeUy, Merioneth. 



19. B. sabuletonun Branth & Eostr. in Bot. Tidsskr. iii. 

 p. 229 (1869), excl. vars. b i- c. — Thallus effuse, thin or very 

 thin, granulose or leprose, sordid-greyish, or whitish (K— , 

 CaCl — ). Apothecia rather small, sessile, at first subplane 

 and thinly margined, then convex and immarginate, pale-brown 

 or brownish-black, pale within; paraphyses concrete, brownish 

 at the apices; hypothecium colourless, brownish above; spores 

 fusiform, 3-7-septate, 0,018-34 mm. long, 0,006-8 mm. thick; 

 hymenial gelatine deep-blue then dark-violet or tawny-wine-red 

 with iodine. — B. spAaeroideg Mudd Man. p. 187 (1861) (non 

 Koerb.). Lichen viridescens Sm. Engl. Bot. t. 2217 (1810) (non 

 Schrad.). Lecidea sabuleiorum Floerke in Berl. Mag. 1808, p. 309 

 pro parte ; Nyl. in Journ. Lann. Soc. ix. p. 254 (1867) ; Cromb. 

 Lich. Brit. p. 71 (excl. vars.) & in Grevillea xxii. p. 57 ; Leight. 

 Lich. Fl. p. 338 ; ed. 3, p. 364. L. hypnophila Turn, ex Ach. 

 Lich. Univ. p. 199 (1810). L. viridescens Hook, in Sm. Engl. 

 Fl. V. p. 180 (1833) (non Ach.). L. suhretnsa Stir1»n in Gre- 

 villea iii. p. 24 (1874) {fide Cromb. in Grevillea iii. p. 143) ; 

 Leight. Lich. Fl. ed. 3, p. 366. 



Exsicc. Leight. n. 91 ; Mudd n. 154; Cromb. n. 175 ; Larb. 

 Lich. Brt). nos. 35, 36, 37 ; Larb. Caesar, n. 81 ; Johns, n. 339. 



Sdb. Incrusting mosses on rocks, old walls, and decayed trunks 

 of trees in maritime but chiefly upland tracts. — Distr. Widely dis- 

 tributed in Great Britain, and usuaUy plentiful where it occurs ; 

 apparently rare in W. Ireland.— B. M. Jersey ; Cobo and St. Martin's, 

 Guernsey ; Shanklin Downs, I. of Wight ; Wadebridge, Newlyn Cliff and 

 St. Breock, Cornwall ; Dittisham Cross, near Dartmouth and Totnes, 

 Devon ; Bathampton Downs, Somerset ; Amberley and near Ciren- 

 cester, GloueestOTshire ; Preston, Shoreham and Henfield Conunon, 

 Sussex ; Broomfield, Essex ; Xorton, near Worcester ; Ludlow, 

 Farlow, Oswestry and Condower Park, Shropshire ; Tenby, Pembroke- 

 shire ; Bridge End, Glamorganshire ; Nannau and DolgeUy, Merioneth ; 

 Chirk, Denbigh ; Kildale, Cleveland, Yorkshire ; Teesdale, Durham ; 

 Heversham Head, Westmoreland; Canlochan Glen, Forfarshire; 

 Killin, Craig Tulloch, Blair Athole and Ben Lawers, Perthshire; 



