374 LICHEXACEI. [lKCANOKA. 



lecanorine), saffron- coloured or tawny-orange. — Cromb. Grevillea, 

 xviii. p. 45. — Lecanora aurantiaca var. erj/thrella Cromb. Lich. Brit, 

 p. 46 ; Leigbt. Lich. Fl. p. 217, ed. 8, p. 207 Lecanora enjtJirella 

 Hook. Fl. Scot. ii. p. 49 ; Sra. Eng. Fl. v. p. 186. Lecidea erythrella 

 Tayl. in Mack. Fl. B.ib. ii. p. 130. Rinodina erythrella Gray, Xat. 

 Arr. i. p. 456. Lichen trijthrellus Ach. Prodr. (1798) p. 43 ; Eng. 

 Bot. t. 1993. Callopisiaa aurantiacuin p. flavovirescens Mudd, Man. 

 p. 137. Lichen Jlavorubescens Huds. Fl. Angl. i. p. 443 pro parte ; 

 \Vitb. Arr. iv. p. 15 pro parte. Lichen aiirantiacus Ligbtf. Fl. Scot. 

 ii. p. 810 pro parte. — Brit. Exs. : Mudd, n. 100 ; Larb. Lich. Hb. 

 n. 20. 



Distiuguished b\- the areolate and more developed thallus, which is 

 often widely expanded. The colour also is of a deeper yellow, though in 

 shady places it is at times yellowish-green. The apothecia, which are 

 numerous, are also smaller, more couvex, with the thalline margin very 

 seldom visible, even in young plants. 



Hab. On rocks and old walls in maritime and upland localities. — Distr. 

 Somewhat local, though plentiful where it occurs in the more hilly tracts 

 of Great Britain ; apparently rare in N.W. Ireland. — B. M. : Hastings, 

 Sussex ; Saltash and Valley of Rocks, Lynton, Devonshire ; near Pen- 

 zance, Cornwall ; North Hill, Malvern, Worcestershire ; Craig-y-Rhiw, 

 Oswestrv, and Llauymyuech IliU, Shropshire; Suowdon, Carnarvonshire; 

 Roseberi-y, Cleveland, Yorkshire ; Brigsteer, Westmoreland ; Alston, 

 Cumberland. Appin and Glen Orchy, Argyleshire ; KiUin, Ben Lawers, 

 Kiunoul Hill, and Blair Athole, Perthshire : Luudie Craigs, Forfarshire ; 

 Castleton of Braemar and Morrone, Aberdeenshire. Kylemore Lake, 

 Connemara, co. Galway. 



Var. /3. inalpina Xyl. Lich. Scand. (1861) p. 142. — Thallus thin, 

 paler or whitish ; otherwise as in the type. — Cromb. GreviUea, xviii. 

 p. 45 ; Lich. Brit. p. 46 pro parte ; Leight. Lich. Fl. p. 218 pro 

 minima parte, ed. 3, p. 207 pro minima parte. — Callopisma auran- 

 tiacum y. inalpininn Mudd, Man. p. 137 pro minima parte. LecOr- 

 nora inalpina Ach. Lich. Univ. (1810) p. 388. 



Differs in the colour of the thallus, which in our few specimens is 

 rather scattered and pale-yellowish. By British authors it has not been 

 rightly distiuguished from L. pyracea. 



Hab. On mica-schist rocks in upland situations.T—Z)?"s^/*. Local and 

 scarce in N.W. England and the S. Grampians, Scotland. — B. M. : Harris 

 Moor, near Whitehaven, Cumberland. Glen Lochay and Ben Lawers, 

 Perthshire. 



Form ruhescens Xyl. Lich. Scand. (1861) p. 142. — Thallus 

 ihinnish, pale-yellowish or whitish. Apothecia convex, reddish- 

 saffron-coloured. — Ciomb. Grevillea, xviii. p. 45. — Lecidea auran- 

 tiaca jo. ruhescens Ach. Meth. (1803) p. 69. 



Only a form of the above variety characterized by the convex, differently 

 coloured apothecia. 



Hab. On schistose rocks in a subalpine region. — Distr. Very sparingly 

 on one of the S. Grampians, Scotland. — B. M. : Ben Lawers Perthshire. 



