4 
LECANORA. ] LECANO-LECIDEEI. 429 
Walthamstow, Essex; Hastings, Sussex; St. Minver and Penzance, 
Cornwall; Cheveley Park, Cambridgeshire ; Bardon Hill, Leicestershire ; 
Malvern Hills, Worcestershire; Wrekin Hill, Shropshire ; Barmouth and 
pogerys Merionethshire ; Island of Anglesea; Roseberry, Cleveland, 
Yorkshire; Eglestone, Durham; Staveley, near Kendal, Westmoreland ; 
Wansbeck, Northumberland. Rerrick, Kirkeudbrightshire ; Tre, 
Argyleshire; Ben Lawers, Perthshire; Portlethen, Kincardineshire; 
Craig Guie, Braemar, Aberdeenshire. Lambay Island, co. Cork; Kil- 
larney, co. Kerry ; Letter Hill, Connemara, co. Galway. 7 
118. L. orosthea Ach. Lich. Univ. (1810) p. 400.—Thallus 
effuse, thin, areolato-rimulose or subpulverulent, yellowish-sulphur- 
coloured (K+ yellow, CaCl—). Apothecia small, biatoroid, convex 
or tuberculoso-difform, immarginate, subconcolorous with the thallus 
or yellowish-flesh-coloured, sometimes sordid or subpruinose; spores 
ellipsoid or oblong, 0,009-16 mm. long, 0,006-7 mm. thick; hyme- 
nial gelatine bluish with iodine.—Leight. Lich. Fl. p. 199, ed. 3, 
p. 183 pro parte.—Lecanora varia subsp. orosthea Cromb. Lich. Brit. 
p- 52. Lecidea orosthea Gray, Nat. Arr. i. p. 470. Lichen orostheus 
Ach. Prodr. (1798) p. 38. 
Approaches LZ. sulphurea, but differs in the thinner, paler, more or less 
pulverulent thallus and the smaller apothecia. It grows chiefly on the 
smooth sides of perpendicular rocks, is very widely effuse, and is either 
entirely sterile or sparingly fertile. The apothecia are more or less scat- 
tered, varying in colour according to degree of exposure. 
Hab. On rocks, granitic and schistose, in maritime and upland districts. 
—Distr. Seen from only a few localities in Great Britain and Ireland, 
but is no doubt more widely distributed, though, from being so frequently 
sterile and the nature of the habitat, specimens are rare in herbaria.— 
B.M.: Land’s End, Cornwall; Ennerdale, Cumberland. West Water, 
Fifeshire; Craig Calliach, Perthshire; Portlethen, Kincardineshire. 
Croghane, co. Kerry ; co, Wicklow ; Kylemore, Connemara, co. Galway. 
Var. G. sublivescens Nyl. Flora, 1872, p. 248.—Thallus as in 
the type. Apothecia often livid or livid-black, epruinose.—Cromb. 
Grevillea, xviii. p. 69.—Lecanora varia var. symmicta form livescens 
Nyl. in Cromb. Lich. Brit. p. 52. 
Differs in the apothecia being naked, frequently variously livid, and 
more especially in the habitat. In our specimens the thallus is usually 
less pulverulent and rather darker. The apothecia are very numerous 
and crowded, some at times appearing as if crowned by the thallus. 
Hab. On the trunks of aged beech-trees in wooded upland districts — 
Distr. Only a few localities in S. and E. England, where, however, it is 
lentiful—B. M.: Near Lyndhurst, New Forest, Hants; Highbeech, 
pping Forest, Essex; Windsor Great Park, Berkshire. 
114, L. epanora Ach. Lich. Univ. (1810) p. 377.—Thallus effuse, 
granulose, thinnish, greenish-yellow, citrino-sorediate, the granules 
globuloso-congested, contiguous or dispersed (K—, CaCl—); bypo- 
thallus blackish or obsolete. Apothecia submoderate, lecanorine, 
