346 LICHENACEI. [coccocaRPIa. 
apothecia. Like Pannularia, it might almost be included among the 
Lecideet (vide Nyl. and Cromb. Journ. Linn. Soe. Bot. xx. p.51); but its 
more appropriate place is in this subtribe. It comprises only a few 
species, which, with a single exception, are natives of warm regions, 
1. C. plumbea Nyl. Mém. Soc. Cherb. v. (1857) p. 109; Lich. 
Scand. p. 128.—Thallus orbicular, coriaceo-membranaceous, sub- 
monophyllous, adnate, radiato-incised and radiately plicato-rugose 
at the circumference, the margins broadly expanded and crenate, 
livid-greyish or livid leaden-coloured ; hypothallus thickish, tomen- 
tose, leaden-bluish. Apothecia small, plane or convex, reddish- 
brown, the margin thin, entire, paler; spores ellipsoid, simple, 
i) 
oe 
Ys 
> 
Fig. 57. 
Coccocarpia plumbea Nyl.—a. A theca and paraphysis, X350. 8. Three spores, 
x 500. ce. Vertical section of two spermogones, x30. d. Jointed sterigmata 
and spermatia, x 500. 
0,016-30 mm. long, 0,007-11 mm. thick ; hymenial gelatine bluish 
with iodine.—Cromb, Lich. Brit. p. 48.—Pannaria plumbea Mudd, 
Man. p. 121; Leight. Lich. Fl. p. 170, ed. 8, p. 154. Placodium 
plumbeum Sm. Eng. Fl. v. p.197. Parmelia plumbea Hook. FI. Scot. 
li. p. 58; Gray, Nat. Arr. i. p. 440; Tayl. in Mack. Fl. Hib. ii. 
p- 142. Lichen plumbeus Lightf. Fl. Scot. ii. (1777) p. 826, t. 26 
(lower fig.) ; With. Arr. iv. p. 60; Eng. Bot. t. 353. Lichen ceru- 
lescens Huds. Fl. Angl. ed. 2, p. 531. Lichenoides tenue et molle, 
Agarici facie Dill. Muse. 179, t. 24. f. 73.— Brit. Hxs,: Leight. n. 
233 ; Cromb. n. 56; Larb. Cesar. n. 72 pro parte ; Lich. Hb. n. 253, 
A well-marked and easily recognized plant, varying in diameter from 
3 to 6 inches, and occasionally still more expanded. The thallus is often 
