114 LECANO-LECIDEKI [bIATORINA 



Brit. p. 63; Leight. Lich. Fl. p. 317. L. diluta Leight. Lich. 

 Fl. ed. 3, p. 343 (1879). 



Exsicc. Leight. ii. 80; Mudd n. 145; Larb. Lich. lib. n. 187. 



Has, like the preceding, been frequently regarded as a species of 

 Lccidca, section Biatora. It is a rather inconspicuous plant from the 

 thallus being little \isible and from the minute fructification. The 

 apothecia are numerous and usually somewhat scattered, with the 

 margin slightly prominent. In some situations they are paler, nearly 

 whitish, and here and there congested (f. Icucostigma Leight. Lich. 

 Fl. ed. 8, p. 344). 



Hab. On the trunks of old firs in maritime and upland dis- 

 tricts. — Distr. Somewhat local in Great Britain and Ireland ; rare 

 in the Channel Islands. — B. M. Eozel, Jersey ; Ulting, Hadleigh 

 Woods, Stanstead Mount Fitchet and Hockley Woods, Essex ; 

 Midhurst and Woolstonbury, Sussex ; Brockenhurst and near Stoney 

 Cross, New Forest, Hants ; Sapperton, Gloucestershire ; near New- 

 market, Cambridgeshire ; Twycross and Gopsall, Leicestershire ; 

 Welshpool, Montgomeryshire ; Bettwys-y-Coed, Denbighshire; Shrews- 

 bury, Shelton and Llanforda, Shropshire ; Costessy, near Norwich, 

 Norfolk ; Cliffrigg, Cleveland, Yorkshire ; Craggy Park, Staveley, 

 Westmoreland ; Barcaldine, Argyll ; Glen Falloch and Ben Lawers, 

 Perthshire ; Durris, Kincardineshire ; near Cork ; Glenstale, Tipperary ;. 

 near Limerick, Clare. 



7. B. jejuna A. L. Sm. — Thallus dark-grey or bluish-grey- 

 green, thin, effuse, continuous or slightly cracked. Apothecia 

 minute, prominent, pale-waxy-reddish with a thickish pale 

 margin ; bypothecium colourless ; epithecium yellowish ; spores 

 ellipsoid, 0,018-23 mm. long, 0,007-9 mm. thick ; hymenial 

 gelatine blue then violet with iodine. — Lecanora jpjuna Nyl. in 

 Flora Iviii. p. 442 (1875). Lecidea suhdiluta Leight. in Trans. 

 Linn. See. ser. 2, i. p. 145, t. 22, tigs. 13-16 (1876) & Lich. Fl. 

 ed. 3, p. 340. 



Exsicc. Larb. Lich, Hb. n. 846. 



Hab. On siliceous rocks, rare. — B. M. Boulay Bay, Jersey (the 

 only locality). 



8. B. Arnold! Krempelh. in Flora xxxviii. p. 72 (1855). — 

 Thallus effuse, thin, subleprose, whitish (K — , CaCl — ). Apothecia 

 small, sessile or adnate, at first concave, margined, at length 

 almost plane and subimmarginate, saffron-reddish, the margin- 

 paler ; paraphyses slender, subdiscrete ; epithecium and hyjDO- 

 thecium deep-yellow ; spores oblong, normally 1 -septate (at times 

 obsoletely 3-septate), 0,013-18 mm. long, 0,005-6 mm. thick ; 

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

 Arnoldi Nyl. in Flora Ixii. p. 223 (1879) ; Crorab. in Journ. Bot. 

 lix. p. 361 (1876); Leight. Lich. Fl. ed. 3, p. 340. 



From the appearance of the young apothecia might at first sight 

 be taken for a Gyalecta. The thallus is often scarcely distinct, and is 



