APPENDIX. 181 



SPH/ERIA magnd, crajfa, atra, fitpem pujlidis notata. Dickfon CCXXX. 

 Crypt. FaJ'.i. P. 23. Weber Goett. 286. Hypoxylon ujlu- maxima. 

 Intum. Bulliard Texte, P. 176. No, 11. Hall. Hijl. No. 

 2192. Mich. Gen. P. 104. Sphceria deujla. - Hoff. Crypt. 

 Faf.l. P. 3. 



GREATEST SPH^RIA, 



TAB.' CLXXXI. 



THIS grows on the flumps of trees and old wood, when far 

 advanced in a ftate of decay ; it is more flat or convex ac- 

 cording to its age ; is perennial, abiding from year to year. The 

 furface is of a dead black, and appears almoft like the leather of 

 an old boot or Ihoe. The fubftance is very brittle, and the fur- 

 face, efpecially in old plants, made very uneven by means of 

 rifing bunches, or tumour-like fwellings, and is clofely befet at 

 one time of the year, with fmall rifing puftules, at another by 

 linking punctures. 



The feed-veffels are fphcerical, and lodged in a flratum clofe 

 under the bark or outer covering of the plant ; to the infide of 

 which, when the plant is dry, they adhere by their mouths, for 

 the reft of the internal fubftance perifhes, and it becomes hollow. 



At B. a piece is obliquely cut off, to ihew the arrangement of 

 the feed-veffels ; and another is cut downright, at C. for the fame 

 purpofe. At D. a fingle feed-veffel is a little magnified; and at 

 E. another cut open. 



The fpecimens here defcribed, grew on the old flump of an 

 afh tree near Elland, amongft others much larger. 



