LECAXORA,] I.F.CAND-I.KriDFr.r. 417 



aud the charncter of tho thalliiiL' inar|jriii of tliii ajjtjtliecia. Tliesu in tlie 

 British specimens are somewhat large and at times scattered. 



Hab. On schistose rocks and walls in maritime and upland districts. — 

 Distr. Onlyspariu^^lyin tiie S.W. lli-rlilands and the Central Th-anipians, 

 Scotland.— 13. M. : Barcaldine, Argyleshire ; Craig TuUoch, IJlair Athole, 

 Perthshire. 



95. L. intnmescens Koerb. Syst. Lich. Germ. (1855), p. 143. — 

 Thallus dttcrminate, thin, smooth, at length rimoso-areolate, whitish 

 (K + yellowish, CaCl — ). Apothccia somewhat convex, moderate, 

 brown or carneous, at times slightly livid-pruinose : the thalline 

 margin thick, entire, indexed or subci enatc, snow-white ; paraphyses 

 crowded, thick, yellowish-brown towards the apices ; epithecium 

 granulose ; spores 0,012-lG mm. long, 0,006-8 mm, thick ; hymenial 

 gelatine bluish, then wine-reddish with iodine. — Cromb. Grevillea, 

 xii. p. 601. — L. subfasra forma intumescens Leight. Lich. Fl. p. 202, 

 ed. 3, p. 186. Pannelia intumescens Rebent. Prodr. PI. neom. 

 (1804) p. 301. Lichen paUidus Dicks. Crypt, fasc. ii. p. 12. — Brit. 

 Exs. : Dicks. Hort. Sic. n. 23. 



Easily distinguished from the allied species by the colour of the thalline 

 margin of the apothecia, though in this respect it is subconfluent with 

 states of L. ruyosa. From this, however, it differs in the thinner, smoother 

 thallus, the less crowded aud more convex apothecia, the colour of the 

 paraphyses, and the thinner spores. The spermogones have the spermatia 

 (as in L. atrynea) 0,0:20-30 mm. long. 



Hah. On smooth trunks and branches of trees in wooded maritime and 

 upland districts.— Z) /*•//•. Local in Great Britain ; very rare in S.W. Ire- 

 land. — B. M. : Shiere, Surrey ; New Forest, Hants ;" Ullacombe, Bovey 

 Tracey, S. Devon : Cirencester, Gloucestershire ; Khiwgreidden, Merio- 

 nethshire. New Galloway, Kirkcudbrightshire ; Barcaldine, Argyle- 

 shire ; Finlarig, Killin, and Craig Calliach, Perthshire ; Morrone, Braemai-, 

 Aberdeenshii'e ; Loch Linnhe, Inverness-shire. Tervoe, co. Limerick. 



96. L. cMarotera Xyl. Flora, 1872, p. 5-50, nota 1. — Thallus 

 determinate or subdeterminate, thickish, areolato-ditfract, verru- 

 culoso-granulate, white (K -f- yellow, CaCl — ). Apothecia large, 

 sessile, plane or somewhat convex, pale-testaceous, the thalline 

 margin thick, crenulate ; spores oblong or ellipsoideo-oblong, 0,009- 

 11 mm. long, 0,007-9 mm. thick ; paraphyses distinct, thick; epi- 

 thecium not inspersed ; hymenial gelatine persistently deep bluish 

 with iodine. — Leight. Lich. Fl. ed. 3, p. 182. 



Distinguished from subspecies L. chlarona by the thicker thallus, the 

 large, paler apothecia, the nou-inspersed epithecium, aud the reaction of 

 the hvmenial gelatine. It has somewhat the aspect of states of Lecanora 

 pallescens, with which, however, it can scarcely be confounded. The 

 apothecia are either somewhat scattered or approximate and subconfluent, 

 occasionallv slightly pruinose, with the thalline margin at length flexuose. 

 In the two British specimens seen the spermogones are only sparingly 

 present, with the spermatia rather longer than in subsp. L. chlarona. 



Hab. On the trunks of trees in upland districts. — Distr. Onlv in the 



2e 



