LECANORA. | LECANO-LECIDEEI. 465 
crenulate (K—, CaCl—). Apothecia minute, innate or slightly 
emersed, plane or somewhat convex, blackish, the thalline margin 
thickish; spores 8nx, subellipsoid, simple, 0,010-14 mm. long, 
0,007-8 mm. thick; paraphyses stout, discrete, brownish at the 
apices ; hymenial gelatine bluish with iodine——Cromb. Grevillea, 
viii. p. 112. 
Allied to Z. ecomplanata Koerb., of which it may be a subspecies, but 
differs among other characters in the larger spores. The thallus spreads 
very extensively over the substratum in the Scottish habitat, but was 
only here and there well fertile. The spermogones, however, in the few 
specimens gathered are plentiful, with spermatia arcuate, 0,018-25 mm. 
long, 0,0006 mm. thick. 
Hab. On a mica-schist rock in an alpine situation.—Distr. Only 
sparingly on one of the S. Grampians, Scotland.—B. M.: Above Loch- 
na-Gat, Ben Lawers, Perthshire. 
161. L. leucophyma Leight. Lich. Fl. (1871) p. 204; ed. 3, 
p- 188.—Thallus subdispersed, thin, smooth, unequal, rimoso- 
diffract, pale or pale-greyish, internally yellowish, sprinkled with 
frequent mastoid papille (K—, CaCl—). Apothecia moderate, 
adnate, badio-reddish or brownish-black ; the thalline margin dis- 
tinct, entire, at length flexuose; spores ellipsoid, 0,023-27 mm. 
long, 0,011 mm. thick; paraphyses slender; hypothecium colour- 
less ; hymenial gelatine ‘bluish, the thece at length tawny-violet 
with iodine.—Cromb. Grevillea, xix. p. 57. 
Easily recognized by the peculiar somewhat fragile papille with 
which the thallus is covered, and which are often of a pinkish colour. 
With us it is for the most part only sparingly fertile, the apothecia be- 
coming dark in age. The spermogones are more common, with spermatia 
minute, 0,0015 mm. long, 0,0005 mm. thick. According to Nylander, 
who describes it, ‘Flora,’ 1879, p. 204, s. n. Lecanora acceptanda, its 
affinity is with L. complanata Koerb. 
Hab. On micaceous rocks in alpine situations.—Distr. Local and scarce 
on the Grampians, Scotland. —B. M.: Summit of Ben Lawers and Craig 
Calliach, Perthshire. . 
162. L. oculata Ach. Syn. (1814) p. 148.—Thallus effuse, more 
or less dactylino-papillate, glabrous, white or greyish-white (K + 
yellowish, then rusty-red, CaCl—). Apothecia innate in the 
apices of the papille, moderate, somewhat concave or nearly plane, 
naked, black; the thalline margin tumid, entire; thece subcylin- 
drical; spores ellipsoid, 0,020-30 mm. long, 0,011-14 mm. thick ; 
paraphyses branched (epithecium K-+violet); hymenial gelatine 
not tinged, but the thece bluish with iodine.—Hook. Fl. Scot. ii. 
p. 47; Mudd, Man. p. 156; Cromb. Lich. Brit. p. 56; Leight. 
Lich. Fl. p. 200, ed. 3, p. 173.—Rinodina oculata Gray, Nat. Arr. 
i, p. 449. Jsidium oculatum Turn. and Borr. Lich. Br. p. 103 
pro parte; Sm. Eng. Fl. v. p. 232 pro parte. Lichen oculatus 
Dicks. Crypt. fase. ii. (1790) p. 17, t. 6. fig. 3; With. Arr. ed. 3, iv. 
p. 7. 
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