24 LECANO-LECIDEEI [lECIDEA 



felt, I. c, by tlie areolate crust being subeffigurate at the iiiargins ; 

 in some specimens, however, to which are referable the British 

 exsiccata, this character is not so apparent. The thallus occasionally 

 occurs in small orbicular, scattered patches, when it is form 7nicro- 

 phyllina Cromb. in Grevillea I. c. (Fr. Lich. Europ. p. 105, sub 

 Parmella) ; it then somewhat resembles form dispcrsa of Lecanora 

 gelida {vide Part I. p. 356). 



Hah. On rocks and walls, rarely on the ground, in maritime and 

 upland situations. — Distr. Only here and there in England, more 

 frequently on the Grampians, Scotland ; seen from only a few localities 

 in Ireland. — D. M. Henfield, Sussex ; near Redruth, Cornwall ; Malvern 

 Hills, Worcestershire ; Cader Idris, Merioneth ; Oswestry and Haugh- 

 mond Hill, Shropshire ; Guisboro' Moor and Cockshaw J3ank, Cleve- 

 land, Yorkshire ; Knitsby, Durham ; King's Park, Stirling ; Achosragan 

 Hill, Appin and Ben Cruachan, Argyll ; Ben Lawers, Kinnoul Hill, 

 Trossachs, and Craig Tulloch, Perthshire; Countesswells Wood, near 

 Aberdeen ; Glen Nevis, Invernessshire ; Dunkerron, Kerry ; Eoss, 

 Clare ; Kylemore and near Glendalough, Galway, 



24. L. prserimata Nyl. in Flora lix. p. 235 (1876).— Thallus 

 effuse^ continuous, thinnish, rimose, the rimse subareolate or 

 subparallel-radiant, white or whitish, sprinkled with concolorous 

 convex often confluent soredia (K — , CaCl + red). Apothecia 

 superficial, small, convex, brown, the epithalline margin 

 evanescent ; spores not rightly developed. — Cromb. in Grevillea 

 V. p. 26 ; Leight. Lich. Fl. ed. 3, p. 282. 



Perhaps, as Nylander says (Z. c), only a subspecies of L. coarctata, 

 differing in the character of the thallus, more especially the presence 

 of soredia. In the single British specimen seen there are only in two 

 instances very faint traces of an epithalline margin to the apothecia, 

 while the spores are immature and scarcely visible. 



Hah. On granitic rocks in a maritime district. — B. M. Jersey (the 

 only locality). 



25. L. Brujeriana Nyl. ex Cromb. Lich. Brit. p. 66 (1870).— 

 Thallus effuse, thinnish, verrucose-glebulose, pale- or sordid-yellow 

 (K — , K(CaCl) -f yellow), at times subevanescent. Apothecia 

 sessile, somewhat large, concave, brownish-black or black (epi- 

 thecium K(CaCl) + reddish), the margin thickish, repand and 

 involute ; hypothecium blackish ; paraphyses very slender, dis- 

 crete ; spores ovoid or ellipsoid, somewhat large, 0,018-21 mm. 

 long, 0,008-11 mm. thick; hymenial gelatine tawny-yellow with 

 iodine. — Leight. Lich. Fl. p. 281 ; ed. 3, p. 285. Parmelia 

 coarctata var. ^ Brujeriana Schser. Lich. Helv. Exs. n. 539 (1847). 



Exsicc. Leight. n. 390. 



Well characterized by the pezizoid apothecia, which at once 

 distinguish it from all states of L. coarctata, to which it is closely 

 allied. The thallus is at times somewhat ochraceous, whence form 

 ochroides Nyl. ex Stirton in Grevillea ii. p. 71, a state to which two of 

 the British spechnens are referable. The spores are often almost 

 uniseriate in the narrow elongate asci. 



