158 LBCANO-LECIDEEI [bACIDIA 



li. p. 165 (1868) j Cromb. Lich. Brit. p. 73 pro parte. L. efusa 

 Ysx.fusceUa Leight. lich. Fl. p. 344 (1871); ed. 3, p. 371. 

 Exsicc. Mudd n. 148 ; Leight. nos. 211, 279. 



Hah. On smooth trunks of trees in upland districts, rarely on 

 old palings. — Disfr. Here and there sparingly in Great Britain, 

 rare in S.W. Ireland. — B. M. Brading Woods, Isle of Wight ; near 

 Lyndhurst, Kew Forest, Hants; Hsham, Torquay and tJllacombe, 

 near Bovey Traeey, Devon ; Hm-stwood, Tunbridge Wells, Sussex ; 

 Eayleigh Wood, Maldon, Hadleigh Woods, Langford and Wellington, 

 Essex; Bathampton Downs, Somersetshu-e ; Northleach, Colesbome 

 and Eodmarton, Gloucestershire ; Warringdon, near Worcester ; 

 Dolgelly, Merioneth ; Brilley, Eadnorshire ; Airyholme Wood, Cleve- 

 land, Yorkshire ; High Force, Teesdale, Durham; Barcaldine, Argyll; 

 near Killin, Ben Lawers and Falls of Moness, Aberfeldy, Perthshire ; 

 Abergeldie and Craig Cluny, Braemar, Aberdeenshire ; Muckruss 

 Demesne and Upper Lake, Killamey, Kerry. 



Var. hypnsea A. L. Sm. — ThaUus very thin, granulose- 

 verrucose. Apothecia at length convex, brown or blackish; 

 spores 0,045-70 mm. long ; hymenial gelatine bluish with iodine. 

 — Lecidea arceuiina var. hypnsea Nyl. in Flora li. p. 165 (1868). 

 L. effusa var. y arceutina i. hypnsea Cromb. in Grevillea xxii. 

 p. 58 (1893). 



Exsicc. Larb. Lich. Csesar. n. 83. 



Eah. Incrusting mosses and hepatics on shady rocks in a maritime 

 loeaUty. — B. M. The Warren Noirmont, Jersey (the only locality). 



19. B. Beckhausii Koerb. Parerg. Lich. p. 134 (I860).— 

 Thallus effuse, thin, granular, unequal, whitish or greyish or 

 evanescent (K — , CaCl — ). Apothecia small, at first plane with 

 a thickish margin, becoming convex and immarginate, black or 

 somewhat paler when moist; hypothecium colourless or pale- 

 brownish ; paraphyses conglutinate, oUve- or greenish-black 

 towards the apices ; spores rod-shaped, blunt at the ends, 

 2-7-septate, 0,016-32 mm. long, 0,002-3 mm. thick ; hymenial 

 gelatine pale-bluish then wine-red with iodine. — Siatora steno- 

 spora Hepp Flecht. Eur. n. 516 (1860). Lecidea umbrina subsp. 

 haciUifera Nyl. Lich. Scand. p. 210 (1861). L. baciWfera 

 Carroll in Journ. Bot. iii. p. 290 (1865); Cromb. Lich. Brit, 

 p. 74 pro parte & in GreviUea xxii. p. 59 ; Leight. Lich. Fl. 

 p. 342 ; ed. 3, p. 370 (excl. var. alpina). L. stenospora Nyl. in 

 Flora Ui. p. 413 (1869) ; Cromb. in Grevillea xxii. p. 59. 



Exsicc. Larb. lich. Hb. n. 516. 



Distinguished by the somewhat narrow hymenium, with shorter 

 asci and spores, and by the dark colour of the epithecium which 

 penetrates downwards. A form with rather large apothecia scattered 

 or aggregate in small groups was found by Crombie parasitic on 

 the squamules of Cladonia pyxidata \ax. pocillum. 



Hah. On bark of trees. — Distr. Somewhat rare throughout the 

 British Isles. — B. M. Xear Lyndhurst, Hants ; Brandon Park, Suffolk ; 

 Dolgelly, Merioneth ; Aberfeldy, Perthshire ; Barcaldine, Argyll. 



