ACOTYLEDONS. LICHENS. Lecidea. 37 



HAB. Upon rocks, Lightf. 



3. L. fusco-atra, crust very thin black cracked and tessellated, 

 areolae chesnut brown plane marginated shining scattered, 

 apothecia rather convex black margined white within. Ach. 

 Syn. Lick. p. 12. Patellaria fusco-atra, Hoffm. PL Lich. 

 t. 54. f. 1. Lichen fusco-ater, Lightf, p. 804. Lichen den- 

 driticus, E. B. t. 1734. 



HAB. Rocks, Lightf. Pentland Hills, Dr. Walker. Ben Lomond, Mr. 



Turner. 



Margin of the crust sometimes fimbriated, where it becomes the Ver- 

 rucaria dendritica, Hoffm. PI. Lich. t. 19. f. 4. 



4. L.fumosa, crust subcartilaginous tessellated smoothish brown- 

 ish grey, apothecia buried in the crust plane margined at length 

 convex clustered and losingt heir margin black, within greyish 

 black. Ach. Syn. Lich. p. 12. Lichen gilbosus, Dicks. PL 

 Crypt, fasc. 2. t. 6.J. 5. Lichen cechumenus, E. B. t. 1830, 

 and L. athrocarpus, E. B. t. 1829. 



HAB. Alpine rocks, upon the summit of Ben Lawers, Dickson. 



5. L. confluenS) crust tartareous somewhat spreading tessellated 

 nearly even greyish brown, apothecia sessile at length irregular 

 convex subglobose confluent black immarginate, within having 

 a thin greyish stratum beneath the disk. Ach. Syn. Lich. p. 16. 

 E. B. t. 1964. 



HAB. Rocks on the Pentland Hills, Sir Jos. E. Smith. On the Cath- 

 kin Hills, near Glasgow, Hopk. On the ascent, south side, and 

 summit, of Ben Lomond, Mr. Turner and Hook. 



6. L. parasema, crust thin submembranaceous greyish white 

 bordered with black at length spreading somewhat granulated, 

 apothecia nearly plane sessile margined black blackish within. 

 Ach. Syn. Lich. p. 17. Lichen parasemus, E. B. t. 1450. 

 L. sanguinarius, Lightf. p. 803. 



HAB. On the bark of trees, frequent, Lightf. , Hopk. 



1 . L. sanguinaria, crust rugose and waited greyish white, apo- 

 thecia at length convex hemispherical somewhat tuberculated 

 black horny and black within having beneath a powdery bright 

 red stratum. Ach. Syn. Lich. p. 19. Lichen sanguinarius, 

 E. B. t. 155. 



HAB. On rocks, Lightf., who has confounded it with L. parasema. 



8. L. atro-vire?is, crust spreading thin black scattered with planish 

 subcontiguous bright yellow areolae, apothecia plane or slightly 

 concave black of the same colour within. Ach. Syn. Lich. 

 p. 21. Verrucaria atro-virens, Hoffm. PL Lich. t. \1 .f. 4. 



ft' S e S ra phica 9 areolae bright yellow plane angular black between 

 and with a black margin. Lichen geographicus, E.B. t. 248. 



HAB. a. Upon rocks about New Posso and other places, Lightf. (B. On 

 rocks frequent. 



9. L. silacea, crust tartareous tessellated yellowish red, apothecia 



