LECAXORA.] Li:cAXo-Li;ciDj;i;i. 361 



Island of Jei"?ev. Xtar (Jlynde, Sussex; Ivi'iiiljle, (ilouco.-ter.sliirf ; 

 ^\'eston, Oxfonlshire : Llanvniyiiffli Hill. Sliin])sliiie ; Ayton, Cleveland, 

 Yorkshire; Broughton Castle, Westinoroland. The Trossachs, Perth- 

 shire; Cove, Kincardineshire; near Aberdeen. 



Form Arnold! Xvl. flora, 1883, p. 1 00.— Thallus very small, 

 cpruinosc, ciiiiiabarine, shortly and narrowly radiose, dittracto- 

 arcolate in the centre. Apothecia minute, concolorous with the 

 thallus. — Croiub. Grevillca, xviii. p. 44. — Ltcanora Arnoldl Wedd. 

 Bull. See. Bot. xxiii. (1876) p. 96. L. miniata Tayl. in Mack- Fl. 

 Hib. ii. p. 140. 



Only a minute condition of the type with naked miniate thallus and 

 apothecia. The three British specimens seen are well fertile. 



H(i/>. On dry calcareous rocks in maritime and mountainous districts. 

 — Distr. Only in N.E. Kngland, the N. Grampians, Scotland, and S.W. 

 Ireland. — li. M. : Hartlepool, Uurham. Morroue, Aberdeenshire. Dun- 

 kerrou, co. Keny. 



Tar. /3. oWiterascens Xyl. Flora, 18S3, p. 99. — Thallus small, 

 slightly and narrowly radiate at the circumference, vitelline. Apo- 

 thecia small, i)laue or convex, the thalline margin at length often 

 obliterated ; spores 0,008-0,011 mm. long, 0,Ou4-5 mm. thick. — 

 Cromb. Joum. Bot. 1885, p. 195. 



According to Nylauder /. c, apparently only a variety of this sub- 

 species. In our British specimens, it occurs on the substratum in small 

 scattered patches, which occasionally have a tendency to become con- 

 tinent. The apothecia are numerous and crowded, almost obliterating 

 the thallus. 



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

 — Distr. Found only in N. England, the Central Grampians, and X.E. 

 Scotland. — B. M. : Near Ayton, Cleveland, Yorkshire ; Bassenthwaite, 

 Cumberland. Craig Tulloch, Blair Athole, Perthshire ; Cove, Kin- 

 cardineshire. 



12. L. dissidens Xyl. Flora, 1875, p. 298. — Thallus orbicular, 

 appressed, somewhat small, stellato-radiate, vitelline ; lacinite 

 narrow, plane or somewhat convex, discrete, subfree at the circum- 

 ference (K -I- purplish). Apothecia small, plane, concolorous (K + 

 purplish), the thalline margin subentire or crenulate ; spores 

 0,009-0,016 mm. long, 0,005-7 mm. thick.— Cromb. Grevillea, iv. 

 p, 1;«;0. — PJacodhun murorinn form dissidetis Leight. Lich. Fl. ed. 3, 

 p. 161. Lichen favicans "\Mth. Arr. ed. 3, iv. p. 25 pro parte. — 

 Lichen eJe<juns Eng. Bot. t. 21S1 (right/-hand fig.). 



Looks like a variety of L. eJegans, but is distinguished by the colour 

 (rarely subminiate) of the planer lacinia;. It approaches states of 

 subsp' L. teyidaris, but the lacinife are more discrete, and the thalline 

 martrin of the apothecia usually more or less crenate. The British 

 specimens are well fertile. 



Hah. On slate roofs of outhouses and on brick walls in lowland and up- 

 land tracts — Lisir. Found only here and there in England, but probably 



