LECANORA.] LECAXO-LECIDEEI. 485 



188. L. rhagadiza Xyl. Flora, 1881, p. 178.— Thallus conti- 

 nuous, unequal, variously rhagadiosely fissured, dark-olive-^reyish 

 (K(CaCl) — ). Apothecia small, innate, concave or plane, reddish- 

 tiesh-coloui'ed ; paraphyses slender ; spores oblongo-bacillar, about 

 0,0035 mm. long, about 0,0010 mm. thick; hymeiiial gelatine 

 tawny-wine-coloured with iodine. — Cromb. Grevillea, x. p. 23. 



A peculiar plant, as observed by Xylander /. c, near L. rufescens, but 

 differs in the characters given of the thallus and apothecia. In the single 

 specimen gathered the thallus is well fertile. 



Hah. On moist sandstone rocks in a maritime locality, — Distr. Ex- 

 tremely local and scarce in N.W. England (Barrowmouth, "Whitehaven, 

 Cumberland). 



189. L. admissa Xyl. Flora, 1867, p. 370, et 1872, p. 36-1.— 

 Thallus indeterminate, adnate, anguloso-areolate, brownish- or dark- 

 red, the areolae plane, contiguous, opaque, blackish beneath 

 (K(CaCl)— ). Apothecia minute, impressed, somewhat angular, 

 subconcolorous, the thalline margin obtuse or little distinct ; para- 

 physes moderate, jointed ; s]»ores oblong, 0,004-5 mm. long, 0,00lU- 

 15 mm. thick; hymenial gelatine bluish, then tawny wine-coloured 

 with iodine. — Cromb. Grevillea, xix. p. 58. — L. discreta Leight. 

 Lich. Fi. ed. 3, p. 171 pro parte. 



A good species well separated from L. i-ufescens, to which it is allied, 

 by the characters of the thallus and the fructification. The apothecia 

 are rarely sohtary, but usually several sUghtly impressed in each areola. 

 In the Scottish locality the thallus was vridely expanded, and, along with 

 the normal apothecia, bearing in the centre a few others, large, superficial 

 and deeply fissured at the margins. 



Hah. On exposed schistose rocks in subalpine and alpine situations. — 

 Distr. Extremely local and rare in X. "Wales and on one of the S. Gram- 

 pians, Scotland.— B. M. : Y Fegle fawr, near Barmouth, Merionethshu-e. 

 Summit of Bjn Lawers, Perthshire. 



190. L. discreta Xyl. Flora, 1872, p. 364. — Thallus verrucoso- 

 areolate, dark- or badious-brown, the areolae turgid, discrete, subru- 

 gtilose (K — , CaCl — ). Apothecia minute, impressed in the areolae, 

 at times slightly convex in the centre, concolorous, the thalline 

 margin obtuse; spores oblong, 0,003-4 mm. long, 0,001 mm. thick; 

 paraphyses slender; hymenial gelatine wine-red with iodine. — Cromb. 

 Grevillea, xix. p. 58 ; Leight. Lich. Fl. ed. 3, p. 171 pro parte. — ■ 

 Parraelia squamulosa y. discreta Ach. Meth. Suppl. (1S03) p. 41. 

 Lecanora admissa (non Xvl.) Cromb. Lich. Brit. p. 57 ; Leight. Lich. 

 Fl. p. 185. 



Characterized by the normally turgid and discrete thalline areolae ; 

 though occasionally in the British specimens they are here and there 

 more depressed and subcontiguous, rarely several contiuent. The apo- 

 thecia are usuaUv solitary, but sometimes several in each areola. 



Hob. On rocks in subalpine tracts. — Distr. Local and scarce in X. 

 England and on the X. Grampians, Scotland. — B. M. : Teesdale, Durham. 

 Summit of the Khoil, near BaUater, Aberdeenshire. 



