378 LICHENACEl. [lECANORA. 



(non Nyl.) Cromb. Journ. Bot. 1873, p. 133 ; Leight. Lich. Fl. ed. 3, 

 p. 213. 



A peculiar species kuown only from Scotland and Norsvay. It is now 

 regarded bj^ Nylander as distinct from L. ferruginea in its limited accep- 

 tation on account of tbe typically lecanorine apothecia. Specimens in 

 which these are darker-coloured, aud with a few exceptions entirely 

 biatorine in appearance, closely approach L. nigricans Tuck., which, 

 however, has the thaUus little developed. 



Hub. On schistose rocks in a maritime tract. — Distr. Extremely local 

 in X.E. Scotland.— B. M. : Near Portlethen, Kincardineshire. 



37. L. cSBsiorufa Xyl. Flora, 1880, p. 388.— ThaUus subdeter- 

 miuate, rimoso- or diffracto-areolate, rugose, thickish, coesio-greyish 

 (Kf + purplish). Apothecia moderate, biatorine, at first concave, 

 then plane, rusty-orange-coloured (K-)- purple), the margin pro- 

 minent, entire or inflcxed, paler ; spores ellipsoid, polari-bilocular, 

 with longitudinal tube, 0,Ul4-16 mm. long, 0,007-9 mm. thick; 

 hypotbecium lax ; paraphyses slender, jointed towards the apices ; 

 by menial gelatine at length wine-red with iodine. — Cromb. Journ. 

 Bot. 1882, p. 273. It may be Lecidea ccpsio-ntfa of British authors 

 pro parte. 



Well separated from L. ferruginea, with which until recently it has 

 usually been confounded, not merely by minor ditferences of the thallus 

 and apothecia, but nKU'e especially by the hypotbecium, the cells of which 

 are much less compact (fide Xyl. in litt.). The numerous apothecia are 

 at times undulate and subcreuulate at the margins. 



Hah. On rocks, chiefly sandstone and schist, in maritime and upland 

 disti-icts. — Distr. Seen only from a few localities in the Chanoel Islands, 

 S.W. and W. England, S. Scotland, the S.W. Highlands, and S.W. 

 Ireland. — B. M. : La Moye, Island of Jersey ; Chateau Point, Island of 

 Sark. The Lizard, Cornwall ; Hollybiish Hill, Malvern ; St. Bees, 

 Cumberland. Rerwick, Kirkcudbrightshire ; near Edinburgh ; Island of 

 Lismore, Argyleshire. Kilkee, co. Clare. 



38. L. phseocarpella Xyl. Flora, 1880, p. 388 nota. — Thallus 

 indeterminate, thin, macular, greyish- white, often nearly obsolete 

 (K — ). Apothecia small, biatorine, plane, brown or dark-brown, 

 often slightly aeruginoso-sufFused (K -(- puqjle), colourless within, 

 thinly margined ; paraphyses moderate, brownish at the apices ; 

 spores ellipsoid, polari-bilocular, often with longitudinal tube, 

 0,014-18 mm. long, 0,006-11 mm. thick. — Cromb. Grevillea, xix. 

 p. 00. — Lecanora nigricans (non Tuck.), Cromb. Grevillea, xviii. 

 p. 45. 



Near L. nigricans (Tuck.), with which it was at one time joined by 

 Nylander as a state (Lapp. Or. p. 128), but is now regarded by him as 

 distinct. Like others of the more immediately allied species it looks 

 almost a vaiiety o? L.ferruginea. The biatorino-lecideine apothecia in 

 the only British specimen gathered are frequent. 



Hab. On the trunk of a fir-tree in a mountainous region. — Distr. Only 

 among the N. Grampians, Scotland, where probably it is not rare. — 

 B. M. : Craig Cluny, Braemar, Aberdeenshire. 



