LECANORA| LECANORACE 309 
Hab. On granitic and schistose rocks in maritime districts.— Distr. 
Local, though plentiful in the Channel Islands, 5.W. England and 
N.E. Scotland.—B. M. Le Fret, Jersey; Tolpedin Penwith, and near 
Penzance, Cornwall; Portlethen, Kincardineshire. 
60. L. mammillifera Stirton in Trans. Glasgow Soc, Nat. 
1875, p. 85.—Thallus minutely cracked-areolate, dark- or 
brownish-grey, the areole plane (K—, CaCl—). Apothecia 
small, prominent, convex, black or brownish-black, internally 
pale-greyish, the margin (thalline?) obtuse, at length depressed ; 
paraphyses few, discrete, thickish, brownish at the clavate apices ; 
hypothecium colourless ; spores ellipsoid, 8-10 » long, 7-8°5 py 
thick ; hymenial gelatine blue then tawny with iodine.—Leight. 
Lich. Fl. ed. 3, p. 201; Cromb. Monogr. i. p. 428. Specimen 
not seen. 
Hab. On rocks in a mountainous district; collected by Stirton at 
Ben-y-gloe, Blair Athole, Perthshire. 
§ iii, Ocurotecnia Massal. Ric. Lich. Crost. p. 30 (1852) 
(as genus). 
Thallus crustaceous. Apothecia small or becoming very 
large, generally with a thick prominent margin; paraphyses 
long, slender, branched and intricate ; spores 2-8 in the ascus, 
usually very large. Spermogones with acrogenous straight 
spermatia. 
This section is very frequently regarded as of generic importance 
on account of the peculiar paraphyses and the very large spores. 
61. L. tartarea Ach. Lich. Univ. p. 371, t. 7, fig. 3 (1810) 
(inel. var. grandinosa).—Thallus wide-spreading, thick, tartareous, 
unequal and corrugate on the surface, of crowded granules or 
warts, whitish or greyish (K + faintly yellow, CaCl + red). 
Apothecia at first innate and closed, opening widely up to 1 cm. 
across, the disc generally plane, often wrinkled, pale yellowish- 
red (CaCl+reddish), the thalline margin thickish, entire or 
corrugate ; paraphyses slender, colourless, loosely coherent, very 
long, flexuous and branched ; spores ellipsoid-oblong, very large, 
40-72 pw long, 20-40 yp» thick; hymenial gelatine blue with 
iodine.—Hook. Fl. Scot. ii. p. 49 & in Sm. Engl. FI. v. p. 191; 
Tay]. in Mackay Fi. Hib. ii. p. 138; Mudd Man. p. 156, t. 2, 
fig. 51; Cromb. Lich. Brit. p. 54 (incl. var. grandinosa) & 
Monogr. i. p. 458; Leight. Lich. Fl. p. 187; ed. 3, p. 175 (incl. 
f. grandinosa). Lichenoides crustaceum et leprosum, acetabulis 
majoribus luteis, limbis argenteis Dill. in Ray Syn. ed. 3, p. 71, 
n. 46 (1724) & Hist. Muse. p. 132, t. 18, fig. 13 (1741). Lichen 
tartareus L. Sp. Pl. p. 1141 (1753); Huds: Fl. Angl. p. 444; 
Lightf. Fl. Scot. ii. p. 811; Engl. Bot. t. 156; With. Arr. ed. 3, 
iv. p. 23. Rinodina tartarea & R. grandinosa 8, F. Gray Nat. 
Arr. i. p. 455 (1821). 
