182 LICHENES. [Lecidea. 



Common in Sussex, on decaying rails, but rarely producing apothecia, 

 Mr. Borrer. — " In the structure of the thallus, this Lichen differs but 

 little from L. scabrosa, E. Bot. t. 1878, which, when growing on a com- 

 pact substance, is found to begin in the same manner, with a film and 

 minute granulations ; but the powder which soon covers the surface is, 

 in that species, of a paler and more yellow hue and the structure of its 

 jwtellulce is different. L. ceruginosa is perhaps more nearly allied to 

 L. quadricolor, E. Bot. t. 1158. Indeed it must be admitted that these 

 two recede more in general appearance than in any essential character, 

 yet it would be scarcely justifiable to regard them as one species. In 

 L. ceruginosa the granulations of the thallus are smaller, more crowd- 

 ed and confluent, and of a greener hue, and the powder they produce 

 is much more copious and of a dark verdigris-green, whilst that in L. 

 quadricolor is not much darker than the granules. The apothecia also are 

 smaller in L.ccruginosa, their margin, perhaps, more elevated and their 

 colour not altogether so variable. From another nearly allied species, 

 L. Lightfootii, E. Bot. t. 1451, the present differs in most of these and in 

 some additional particulars." Borr. From the variable colour of the 

 apothecia of this species, it will be seen that it has an equal claim to rank 

 with the former as the present section of the Genus, a section eminently 

 artificial. 



45. L quadricolor, Borr. Mss. (four-coloured Lecidea); crust 

 leprous-grey with white granulations, young apothecia gelatin- 

 ous flesh-coloured with a pale border old ones blackish. Sm. — 

 Lichen quadricolor, Dicks. Cr. Fasc. 3. p. 15. t. 9.f. 3. E. Bot. 

 t. 1185. — Lecidea decolorans, Florke. — Ack. Syn.p. 37, and /3. 

 granulosa, of the same. — L. escharoides, L. desertorum and L. 

 artyta, Ach. Lich. Univ. (Borrer). 



On the ground, in heathy and sandy places, in perfection during the 

 moist winter-months. 



46. L. corondta, Borr. Mss. (crenate- shielded Lecidea?); crust 

 of minute granulations scarcely lobed and imbricated, warts or 

 scales olive-brown, apothecia crowded flattish red-brown their 

 border elevated narrow crenate. Sm. — Verrucaria and Psora 

 coronata, Hoffm. — Lichen granulosus and L. pezizoides, Dicks. 

 — Lichen brunneus, E. Bot. t. 1246. — Lecanora brunnea, (3. coro- 

 nata, Ach. Syn. p. 192. — (3. escharoides; crust brownish ash- 

 coloured composed of granulated warts, apothecia convex irre- 

 gular black with an obsolete black border. Lichen escharoides, 

 E. Bot. t. 1247, (not Ach.). 



On the earth, among turf or decayed mosses. — £. on turfy ground or 

 on rocks, Cornwall, and at Yarmouth, Mr. Turner. — Mr. Borrer con- 

 siders the Lichen escharoides of E. Bot. to belong to this species ; I 

 have therefore made it the var. /3. 



47. L. anomala, Ach. (tumid brown-shielded Lecidea); crust 

 very thin continued smoothish glaucous-white, apothecia scat- 

 tered small sessile brown with a light border of their own sub- 

 stance at length hemispherical blackish the border disappear- 

 ing. Sm Ach. Syn.p. 38 Lichen cyrtellus, E. Bot. t. 2155. 



/S. effusa ; crust thin powdery light-green, apothecia pale waxy- 

 brown with a paler border at length convex without any bor- 



