biatoeina] lbcidbace* 125 



nora commutata Ach. Lich. TJniv. p. 352 (1810). Lecidea Light- 

 footii var. /S commutata Schaer. Enum. p. 138 (1850) ; Cromb. 

 Lich. Brit. p. 65 ; f. commutata Leight. Lich. Fl. p. 319 ; ed. 3, 

 p. 333. 



Might perhaps he regarded as merely an old condition, charac- 

 terized by the thallus becoming dissolved and pulverulent throughout. 

 Transition states to the type are not wanting, and in otherwise typical 

 specimens the granules are here and there deliquescent. Sohserer 

 describes the apothecia as being also oarneous or reddish-brown, 

 colours not visible in his own specimen or in ours ; they are blackish 

 and sometimes slightly umbonate. 



Hah. On the trunks of old trees, rarely on old palings, in maritime 

 and upland tracts. — Distr. Eare in S. England, S. Ireland, and the 

 ■Channel Islands. — B. M. Patrimonie, Jersey ; near Parham, Sussex ; 

 Brockenhurst, New Forest, Hants ; near Cirencester, Gloucestershire ; 

 Killaloe, Clare ; Cahirlogue, near Glenmire, and Agharda, Cork. 



26. B. atropurpurea Massal. Ric. Lich. p. 135 (1852). — 

 Thallus efifuse, thin, granulose-leprose, greenish-grey (K — , 

 CaCl — ). Apothecia small, appressed or adnata, plane, thinly 

 margined, purplish- or brownish-black ; paraphyses discrete, 

 brownish at the apices ; hypothecium pale ; spores subellipsoid, 

 0,011-15 mm. long, 0,005-7 mm. thick; hymenial gelatine pale- 

 bluish then deep-wine-red with iodine. — Mudd Man. p. 178. 

 Lecidea sphseroides var. /? atropurpurea Schser. Spicil. p. 165 

 (1833). L. atropurpurea Cromb. Lich. Brit. p. 64 (1870) ; 

 Leight. Lich. Fl. p. 324 ; ed. 3, p. 338. L. atropurpurascens 

 Nyl. in Flora Ivi. p. 294 (1873) ; Leight. Lich. Fl, ed. 3, p. 338. 



Exsicc. Larb. Lich. Hb. n. 151 ; Johns, n. 338. 



Hab. On trunks of old trees in wooded maritime and upland 

 districts. — Distr. Only a few localities in S. England, Wales, and 

 W. Ireland; not seen from Scotland. — B. M. Kozel, Jersey; St. 

 Leonard's Forest and Chillington, Sussex; New Forest, Hants; 

 Cockington, Devon; Selhurst, Surrey; Stanstead Park, Essex; 

 Garth, Dolgelly, Merioneth ; Gwydir Woods, Bettws-y-Coed, Denbigh- 

 shire ; Calder Abbey Grounds, Cumberland ; Glenbower Wood, Cork ; 

 Dinish, Cromaglown and Glengariff, Kerry ; Lough Inagb, Coimemara, 

 Oalway. 



27. B. intermixta A. L. Sm. — Thallus determinate, thin, 

 subgranulose-rugulose, greyish or greyish-green (K + yellow, 

 CaCl — ). Apothecia moderate, plane or somewhat convex, 

 brownish-black or black, the margin obtuse, thin, at length 

 obliterated ; dark within ; paraphyses slender or not well 

 discrete ; epithecium slightly blackish ; hypothecium reddish- 

 brown (K + violet) ; spores ellipsoid or oblong, 0,015-18 mm. 

 long 0,006-7 mm. thick ; hymenial gelatine bluish then wine-red 

 with iodine. — Lecidea intermixta Nyl. in Ann. Sci. Nat. ser. 4, iii. 

 p. 161 (1855) ; Cromb. Lich. Brit. p. 64; Leight. Lich. Fl.p. 314. 



