LECANORA| LECANORACEX 307 
Apothecia rather large, flexuous and deeply crenate-indented, 
sometimes proliferous with smaller apothecia growing on the 
margins, the disc dark-brown, the margin thickish, crenulate ; 
paraphyses discrete, septate and uneven, scarcely thickened 
upwards ; spores globose-ellipsoid, up to 9 p» long, 7 p thick ; 
tips of the asci blue, hymenium otherwise wine-red, with iodine. 
—Cromb. in Journ. Bot. xiii. p. 140 (1875) & Monogr. i. p. 453 ; 
Leight. Lich. Fl. ed. 3, p. 199. 
Considered by Crombie to be closely allied to L. badia, but differing 
widely in apothecial and hymenial characters; as in that species, 
there is a thick wall over the apex of the asci. Spermogones are 
recorded as frequent, with spermatia 4-5 » long and scarcely 1 p thick. 
Hab. On weathered quartzose stones.—B. M. Summit of Ben 
Cruachan, Argyll (the only locality). 
56. L. nitens Ach. Syn. Lich. p. 335 (1814); Nyl. in 
Flora lii. p. 298 (1869).—Thallus spreading, thickish, cracked- 
areolate, the areole of rounded granules or somewhat scaly, dull- 
or dark-brown, the hypothallus black, little visible (K—). 
Apothecia moderate in size, numerous and crowded, appressed, 
the dise plane, brownish-black, the thalline margin thin, entire, 
paler; paraphyses coherent, stoutish, uneven, septate, brown 
upwards; spores oblong, 9-18 pw long, 2°5-4°5 pw long; the 
thickened tips of the asci persistently blue with iodine.—Cromb. 
in Journ. Bot. xx. p. 274 (1882) & Monogr. i. p. 454. Patellaria 
nitens Pers. in Ann. Wetter. Ges. ii. p. 12 (1810). 
Resembles L. badia, but the thallus of our specimens is lighter in 
colour and the spores are different, generally they are about 12 u long 
and about 3 . thick; I have notseen any solongas18y. Sphinctrina 
kylemoriensis grows on this lichen. 
Hab. On schistose rocks.—Distr. Local, but plentiful in one of 
the Channel Islands.—B. M. Chateau Point, Sark. 
57. L. atriseda Nyl. in Act. Soc. Linn. Bord. sér, 3, i. p. 337 
(1856) & Lich. Scand. p. 170.—Thallus of rounded contiguous or 
scattered granules or warts, reddish- or dull-brown (K—). 
Apothecia numerous, rather small, at first immersed in the 
granules, gradually widening and becoming plane and appressed, 
concolorous with the thallus, the margin thin, entire; paraphyses 
coherent, rather slender, septate, scarcely wider upwards, or 
slightly capitate, the epithecium brown ; spores ellipsoid, 8-12 pu 
long, 5-7 » thick.—Cromb. in Journ. Bot. ix. p. 178 (1871) & 
Monogr. i. p. 453. LD. badia var. atriseda Leight. Lich. Fl. 
p- 213 (1871); ed. 3, p. 188. Parmelia badia var. atriseda Fr. 
Nov. Sched. Crit. 182/, p. 6 & Lich. Eur. p. 149. 
This lichen is always associated with Rhizocarpon geographicum. 
Malme (Bot. Centralbl. lxiv. p. 46 (1895) ) describes the association as 
a case of ‘antagonistic symbiosis,” the Lecanora gradually invading 
and destroying the Rhizocarpon tissues. 
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