LECANORA| LECANORACEE 321 
Hab. On siliceous rocks or walls, rarely incrusting mosses on 
trunks of old firs in maritime and subalpine districts.—Dvistr. Rare 
in N. England (Cumberland and Westmoreland), and among the 
Grampians and N.E. Scotland.—B. M. N. England; Ben Lawers and 
Craig Tulloch, Perthshire ; Portlethen, Kincardineshire. 
73. L. leucophyma Leight. Lich. Fl. p. 205 (1871).— 
Thallus of contiguous or scattered smooth rounded or con- 
torted warts or papille, pale- or pinkish-grey, pale-yellow within 
(K—, CaCl—). Apothecia moderate in size, the disc brownish- 
red or -black, the thalline margin prominent, entire, becoming 
flexuose ; paraphyses slender ; spores broadly ellipsoid, thick- 
walled, very large, 23-35 p long, up to 20 » thick.—Leight. 
op. cit. ed. 3, p. 188; Cromb. Monogr. i. p. 465. 
Easily recognized by the papille of the thallus. The apothecia 
are rare, the spores vary greatly in size ; as L. acceptanda Ny]. (near to 
L. complanata Koerb.), it was described in Flora Ixii. p. 204 (1879) 
with spores 23-27 4 x lly. The above measurements are from 
Leighton’s specimen. Spermogones are present with minute spermatia 
1°5 pw long, °5 p» thick. 
Hab. On micaceous rocks in alpine situations.—Dvistr. Rare 
among the Grampians, Scotland.—B. M. Ben Lawers and Craig 
Calliach, Perthshire. 
d. Thallus grey or brownish-grey, warted or areolate, K—. 
74. L. gibbosa Nyl. in Not. Sallsk. Faun. & FI. Fenn. Forh. 
n.s. v. p. 137 (1866).—Thallus determinate, thick, deeply cracked, 
the areole warted or “gibbous,” light- or dark-grey or dark 
greenish-brown on a black hypothallus (K —,CaCl—). Apothecia 
rather small, immersed and concave, becoming plane, the disc 
brown then blackish, the thalline margin entire or slightly 
crenulate, persistent; paraphyses coherent, long, subflexuose, 
rarely branched, thickly septate, moniliform towards the tips, 
which are generally brownish, or the epithecium dark-brown ; 
spores 4-8 in the ascus, ellipsoid or subglobose, large, with a 
distinct epispore, 21-38 p long, 12-24 » thick ; hymenial gelatine 
blue, then quickly wine-red with iodine.—Cromb. Lich. Brit. 
p- 55 pro parte & Monogr. i. p. 460 (excl. var. lusea). Leight. 
Lich. Fl. p. 210 (excl. ff. lacustris and punctata); ed. 3, p. 194 
(incl. ff. vulgaris, porinoidea, squamata). LL. aspersa Borr. in 
Engl. Bot. Suppl. t. 2728 (1832); Hook. in Sm. Engl. FI. v. 
p. 188. L. tuberculosa Hook. 1. ¢. (1833). Lichen gibbosus Ach. 
Lich. Suec. Prodr. p. 30 (1798) ; Dicks. Pl. Crypt. fase. ii. p. 20, 
t. 6, fig. 5 (1790)? With. Arr. ed. 3, iv. p. 20? L. fibrosus Sm. 
Engl. Bot. t. 1732 (1807). L. tuberculosus Sm. tom. cit. t. 1733. 
Urceolaria gibbosa Ach, Meth. Lich. p. 144 (1803); 8. F. Gray 
Nat. Arr. i. p. 458 (incl. var. fimbriata) ; Hook. in Sm. Engl. FI. 
v. p. 172. U. fimbriata Ach. tom. cit. p. 145. Rinodina tuber- 
culosa S. F. Gray Nat. Arr. i. p. 452 (1821). Zeora gibbosa fi. 
a: ¥ 
