346 



LICHENACEI. 



[COCCOCAKPIA. 



apothecia. Like Pannularia, it might almost be included among the 

 Lecideei (vide Nyl. and Cromb. Journ. Linn. Soc. 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. plnmbea Nyl. Mem. Soc. Cherb. v. (1857) p. 109 ; Lich. 

 Scand. p. 128. Thallus orbicular, coriaceo-membranaceous, sub- 

 monophyllous, adnate, radiato-inciscd and radiately plicato-rugose 

 at the circumference, the margins broadly expanded and crenate, 

 livid-greyish or livid leaden-coloured ; hypothallus thickish, tomcn- 

 tose, leaden-bluish. Apothecia small, plane or convex, reddish- 

 brown, the margin thin, entire, paler ; spores ellipsoid, simple, 



Fig. 57. 



Coccocarpia plumbed Nyl. a. A theca and paraphysia, x350. b. Three spores, 

 X 500. c. Vertical section of two spermogones, X 30. d. Jointed sterigmata 

 and spermatia, x500. 



0,016-30 mm. long, 0,007-11 mm. thick ; hymenial gelatine bluish 

 with iodine. Cromb. Lich. Brit. p. 43.Pannaria plumbea Mudd, 

 Man. p. 121 ; Leight. Lich. Fl. p. 170, ed. 3, p. 154. Placodium 

 plumbeum Sm. Eng. Fl. v. p. 197. Par melia plumbea Hook. Fl. Scot. 

 ii. p. 53 ; 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 cceru- 

 Jescens Huds. Fl. Angl. ed. 2, p. 531. Lichenoides tenue et molle, 

 Agarici facie Dill. Muse. 179, t. 24. 1 73. Brit. Exs. : Leight. n. 

 233 ; Cromb. n. 56 ; Larb. Caesar, n. 72 pro parte ; Lich. Hb. n. 253. 



A well-marked and easily recognized plant, varying in diameter from 

 y to 6 inches, and occasionally still more expanded. The thallus is often 



