LECANORA. ] LECANO-LECIDEEL. 417 
and the character of the thalline margin of the apothecia. These in the 
British specimens are somewhat large and at times scattered. 
Hab. On schistose rocks and walls in maritime and upland districts.— 
Distr. Only sparingly in the S.W. Highlands and the Central Grampians, 
Sarena M.: Barcaldine, Argyleshire ; Craig Tulloch, Blair Athole, 
erthshire, 
95. I. intumescens Koerb. Syst. Lich. Germ. (1855), p. 143.— 
Thallus determinate, thin, smooth, at length rimoso-areolate, whitish 
(K + yellowish, CaCl—). Apothecia somewhat convex, moderate, 
brown or carneous, at times slightly livid-pruinose; the thalline 
margin thick, entire, inflexed or subcrenate, snow-white ; paraphyses 
crowded, thick, yellowish-brown towards the apices; epithecium 
granulose ; spores 0,012-16 mm. long, 0,006—8 mm. thick ; hymenial 
gelatine bluish, then wine-reddish with iodine.—Cromb. Grevillea, 
xii. p. 601.—ZL. subfusca forma intumescens Leight. Lich. Fl. p. 202, 
ed. 3, p. 186. Parmelia intumescens Rebent. Prodr. Fl. neom. 
(1804) p. 301. Lichen pallidus Dicks. Crypt. fase. ii. p. 12.— Brit. 
Exs.: Dicks. Hort, Sic. n. 23. 
Easily distinguished from the allied species by the colour of the thalline 
margin of the apothecia, though in this respect it is subconfluent with 
states of Z. rugosa. From this, however, it differs in the thinner, smoother 
thallus, the less crowded and more convex apothecia, the colour of the 
paraphyses, and the thinner spores. Thespermogones have the spermatia 
(as in L. atrynea) 0,020-30 mm. long. 
Hab. On smooth trunks and branches of trees in wooded maritime and 
upland districts.— Distr. Local in Great Britain; very rare in §.W. Ire- 
land.—B. M.: Shiere, Surrey; New Forest, Hants; Ullacombe, Bovey 
Tracey, S. Devon; Cirencester, Gloucestershire; Rhiwgreidden, Merio- 
nethshire. New Galloway, Kirkcudbrightshire; Barcaldine, Argyle- 
shire; Finlarig, Killin, and Craig Calliach, Perthshire ; Morrone, Braemar, 
Aberdeenshire ; Loch Linnhe, Inverness-shire. Tervoe, co. Limerick. 
96. L. chlarotera Nyl. Flora, 1872, p. 550, nota 1.—Thallus 
determinate or subdeterminate, thickish, areolato-diffract, verru- 
culoso-granulate, white (K + yellow, CaCl—). Apothecia large, 
sessile, plane or somewhat convex, pale-testaceous, the thalline 
margin thick, crenulate; spores oblong or ellipsoideo-oblong, 0,009- 
11 mm. long, 0,007-9 mm. thick ; paraphyses distinct, thick; epi- 
thecium not inspersed; hymenial gelatine persistently deep bluish 
with iodine.—Leight. Lich. Fl. ed. 3, p. 182. 
Distinguished from subspecies L. chlarona by the thicker thallus, the 
large, paler apothecia, the non-inspersed epithecium, and the reaction of 
the hymenial gelatine. It has somewhat the aspect of states of Lecanora 
pallescens, with which, however, it can scarcely be confounded. The 
apothecia are either somewhat scattered or approximate and subconfluent, 
occasionally slightly pruinose, with the thalline margin at length flexuose. 
Jn the two British specimens seen the spermogones are only sparingly 
present, with the spermatia rather longer than in subsp. L. chlarona, 
Hab. On the trunks of trees in upland districts.—Distr. Only in the 
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