Calicium.] 



LICHENES. 141 



tula plano-convex with a slightly convex disk. Turn, and 

 Borr. I. c. 



Very common on decaying wood in shady places. — 0. on Poplars, at 

 Killarney, Ireland, Sir T, Gage — Distinguishable from the preceding, to 

 which, of all the British species, it is most nearly allied, by its stouter 

 and straight stipes and wholly black colour. 



12. C. debile, Turn, and Borr. (slender Calicium); crust 

 filmy very thin white, pilidia stipitate, stipes slender flexuose, 

 capitulum plano-convex black with a recurved margin, sporules 

 black forming a slightly convex compact disk. Turn, and Borr. 

 Licit. Br. p. 151.— Lichen delnlis, E. Bot. t. 246:2.— DHL 

 Muse. p. 78. t. 14. /. 3. A. ? 



On old timber, frequent under the eaves of thatched buildings. — 

 When viewed under a glass, Messrs. Turner and Borrer observe that the 

 perfect pilidium has precisely the appearance of a small black Agaricus, 

 the capitulum being convex above and recurved and rounded at the 

 edges* The stipes is incrassated at the base. 



13. C. sphterocephalum, Ach. (round-headed Calicium); crust 



filmy very thin greyish sprinkled irregularly with yellowish- 

 grey powder, pilidia stipitate, capitulum subglobose rusty- 

 brown with a narrow somewhat inflexed border, sporules black. 

 Ach. Sijn. p. 57. Turn, and Borr. Lich. Br. p. 153. Schcer. 

 Lich. Heir. p. 4. n. 8. — C. salicinum, Pers. in f'si. Ann. v. 7. 

 p. 20. t. 3./ 3. — Lichen spharocephalus, Web, — E. Bot. t. 414. 

 — Dill. Muse. t. 14. /. 3. — (3. crustosum; covered with a pale 

 greenish-yellow powder, forming an almost continuous crust. 



On old wood, on the bark and in the hollow trunks of trees, in Nor- 

 folk, Suffolk, Sussex, and the North of England.— " Allied to C curium, 

 and C. ilcbilc, but seeming to differ essentially from the former, by its 

 Longer stipes, and from both, by the colour of its pilidia and the powder} 

 appearance of the thaliutJ' 



14. C. arugindsum, Turn, and Borr. ( Verdigris Calicium); 

 crusl a very thin whitish film every where covered with pow- 

 dery granulations of verdigris grey, pilidia stipitate, capitulum 

 subglobose pruinose with ;l thin erect border, sporules blackish- 



brown pruinose. Turn, and Borr. L,ch. B>>. />. 156. /-'• Bot 



t. l'o(>2. — Q. carulescens ; crust small, tumid patches of bluish- 

 grey granulations, dispersed on a white film. Turn, and 

 Borr, I. e. 



Old palea near 1**11 r \ , Suffolk, Rev. G. Ii. Lcnihrs.—:-. on the boards 

 ofa hovel near < uckfield, Sussex. — Among the British Calicia,the present 

 most approaches C. hyperellum and C, tphatrocephalum B.J but the 

 different and much duller colour of the thaltu* suffices, to distinguish it at 

 first sight. The second var. t it is observed in the Lich. Brit, resembles 

 C, davelltm rather i loselj in the granulations of the thallus, nod some- 

 what in the colour of the pilidia; but the latter are much more slender 



than in that BD4 Cl( V and the |f»< > ul< s are not b'.ai k. 



15. ('. peroiuUlum, Ach. Meih. (cinnamon-headed Calicium); 

 crasl ■ \er\ thin film irregularly sprinkled with powder white, 

 pilidia stipitate white, capitulum plano-convex, spornles fle sB 



