142 LEOANO-LECIDEEI [bILIMBIA 



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

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

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

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

 brown or blackish ; hypotheciuni 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. spododes 

 Nyl. in Flora Hi. p. 410 (1869) ; Cromb. in Journ. Bot. vii. p. 233 

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



Hab. On old palings. — Distr. Eare in the South of England and in 

 Wales. — B. M. Lyndhurst, New Forest, Hants ; Dolgelly, Merioneth. 



19. B. sabuletorum Branth k Bostr. in Bot. Tidsskr. iii. 

 p. 229 (1869), excl. vars. b & 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.— J5. sphseroides Mudd Man. p. 187 (1861) (non 

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

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

 pro parte ; Nyl. in Journ. Linn. 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. suhretusa Stirton 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. Hb. nos. 35, 36, 37; Larb. Caesar, n. 81 ; Johns, n. 339. 



Hab. Incrusting mosses on rocks, old walls, and decayed trimks 

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

 tributed in Great Britain, and usually 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, Gloucestershire ; Preston, Shoreham and Henfield Common, 

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

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

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

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

 Heversham Head, Westmoreland; Canlochan Glen, Forfarshire; 

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



