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LECANORA | LECANORACER® 32! 
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discrete, stoutish (about 2 yp thick), sparsely branched and 
septate, variously clavate or capitate at the tips and dark-brown, 
the pigment descending often 15-20 »; spores ellipsoid, small, 
10-14 y long, 6-8 » thick ; hymenial gelatine blue with iodine. 
—Cromb. in Grevillea xii. p. 89 (1884) & Monogr. i. p. 480. 
This species was placed by Nylander in a distinct section on 
account of the form of sterigmata and spermatia. The spermogones 
are very minute, the sterigmata are short tufted branches bearing at 
the tips minute rod-like spermatia about 3 » long, 1, thick. It is 
allied, according to Nylander, with L. intercincta, a Portuguese lichen. 
Hab. On schistose rocks in a hilly locality—B. M. Red Screes, 
Westmoreland (the only record). 
e. Thallus dark in colour, K—. 
- 
(1872) note.—Thallus determinate, rather thin, and membrana- 
ceous at the circumference, wrinkled, cracked-areolate and thicker 
especially towards the centre, sometimes shining, olivaceous-grey, 
hypothallus scarcely visible (K —, CaCl —). Apothecia rather 
small, immersed, often irregular in form, the disc black ; para- 
physes slender, long, subflexuose, moniliform towards the tips, 
which are brown, or the epithecium dark-brown ; spores ellipsoid, 
16-22 p long (rarely 24 y), 10-12 p (rarely 16 ») thick ; hymenial 
gelatine blue then quickly wine-red with iodine.—Cromb. in 
Journ. Bot. xx. p. 274 (1882) (excl. spec. from Lazonby). 
L. gibbosa subsp. lusca Cromb. in Grevillea xix. p. 57 (1891) ; 
var. lusea Wain. in Medd. Soc. Faun. & Fl. Fenn. vi. p. 168 
(1881) ; Cromb. Monogr. i. p. 471. 
Described sometimes as a variety of Aspicilia silvatica. It differs 
from J. gibbosa in the thinner olivaceous thailus and smaller spores 
and in the longer spermatia, given as 16-21 p» long, but this has not 
been verifiable. The specimen from Lazonby belongs to L. cinerea. 
79. L. lusca Nyl. in Bull. Soc. Linn. Norm. sér. 2, vi. p. 288 
Hab. On rocks in maritime and hilly regions.— Distr. Rare though 
widely distributed in the Channel Islands and Great Britain.—B. M. 
Chateau Point, Sark; Breiddon Hill, Montgomeryshire; Barmouth, 
Merioneth; Battersby and Newton, Cleveland, Yorkshire; Ben Lawers 
and Craig Calliach, Perthshire ; Bay of Nigg, Kincardineshire. 
80. L. subdepressa Nyl. in Bull. Soc. Linn. Norm. sér. 2, vi. 
p. 287 (1872).—Thallus rather thin, plane, irregularly cracked, 
smooth or somewhat wrinkled, cinereous or dark-grey (K—, 
CaCl —). Apothecia rather small, scattered, immersed then 
emergent, the disc and margin black, the thalline margin 
excluded ; paraphyses coherent, slender, often flexuose, septate, 
dark-brown above ; spores ellipsoid, variable in size, 18-32 p long, 
11-15 p» thick ; hymenial gelatine faintly blue then quickly wine- 
red with iodine.—L. gibbosa subsp. subdepressa Lamy in Bull. 
Soc. Bot, Fr. xxv. p. 420 (1878) ; Cromb. in Grevillea xix. p. 57 
