ACOTYLEDONS. LICHENS. LeCldeci. 37 



Hab. Upon rocks, Lightf. 



3. h, fiisco-atra, crust very thin black cracked and tessellated, 

 areolie chesnut brown plane marginated shining scattered, 

 apothecia rather convex black margined white within. Ach. 

 Syn. L'lcli. p. 12. PateUaria Jiis>co-atra, Hoff-'jn. PL Lich. 

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

 drilicus, E. B. t. 1/34. 



Hab. RockSj Lightf. Pentland»Hills, Dr. Walker. Ben Lomond^ Mr. 



Turner. 

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



rucaria dendritiea, Hoffin. PL Lick. f. 19. f. 4. 



4. L.fumosu, 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 gibl/osus, Dicks. PL 

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

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



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



5. L. cowy?Me7Z5, 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. Hocks on the Pentland Hills, Sir Jas. 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 parasemusy E. B. t. 1450. 

 L. sanguinarius, Light/, p. 803. 



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



7. L. sanguinaria, crust rugose and warted greyish white, apo- 

 thecia at length convex hemisphserical somewhat tuberculated 

 black horny and black within having beneath a powdery bright 

 red stratum. Ach. Syn. Lich. p. \9. 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. Sy7i. Lich. 

 p. 21. Verrucaria atro-virens, HoJ^m. PL Lich. t. Vj .f. 4. 



|3. geographica, 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. /3. On 

 rocks frequent. 



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



