22 EPHEBACEI. [EUOPSIS. 



Tribe II. PYRE NO PS El, Nyl. ex Stiz. St. Gall. Nat. Ges. 

 1876, p. 192 (cfr. Cromb. Grevillea, v. p. 76). 



Thallus effuse, thinly granulose or subsquamulose, rarely sub- 

 fruticulose, within rubricose ; gonimia tunicated, single or several 

 in gelatine-cellular, nodulose and variously arranged syngonimia : 

 medullary filaments wanting. Apothecia small or minute, lecano- 

 rine or pyrenocarpous, paraphyses jointed or simple ; spores 8nae, 

 very rarely numerous, simple, ellipsoid, colourless. Spermogones 

 innate, with simplish sterigmata. 



This tribe differs considerably in external appearance alike from the 

 preceding and the following, though in the structure of the thallus and 

 the character of the gonimia it nearly agrees with them. Both genera of 

 which it consists occur in Britain, and may readily be recognized by the 

 blood-red colour of the thallus, which becomes apparent when it is 

 moistened. 



3. EUOPSIS Nyl. 

 Flora. 1875, p. 363 

 (cfr. Cromb. Gre- 

 villea, v. p. 76). 

 Thallus thinly crns- 

 taceous, fragile, 

 granulate - areolate ; 

 gonimia simple or 

 several in nodulose 

 syngonimia. Apo- 

 thecia lecanorine, 

 small or moderate, 

 paraphyses articu- 

 late ; spores 8nae ; 

 hymenial gelatine 

 bluish with iodine. 

 Spermogones with 

 oblong minute spcr- 

 matia. 



Fig. 3. 



kamaled Nyl. a. Section of the thallus, x200. 

 b. Two gonimia, X 350. c. Two syngonimia, 

 X 350. d. Section of apothecium, x 30. e. Sec- 

 tion of part of hymenium, with theca and para- 

 physes, X 350. /. Spores, X 500. g. Section of 

 spermogone, X 30. h. Sterigmata and spermatia, 

 X oOO. 



The old genus Pyrenopsis Nyl. has lately received so many additions 

 that it has been broken up by its author into several genera. The 

 present genus is well distinguished from Pyrenopsis by the lecanorine 

 apothecia and the jointed paraphyses. 



1. E. haemalea Nyl. Flora, 1875, p. 363. Thallus indeter- 

 minate, granulose, thinnish, verrucoso-diffract, dark blood-red. 

 Apothecia moderate, plane or convex, somewhat shining, subeon- 

 colorous, or rather paler, the thalline margin thin, at lenth 

 excluded ; spores simple, 0,01 1-16 mm. long, 0,006-7 mm. thick ; 

 hymenial gelatine, especially the thecae, deep-blue with iodine. 

 Cromb. Grevillea, xv. p. 10. Pyrenopsis hcemalea Nyl., Strn. 

 Grevillea, ii. p. 71; Cromb. Journ. Bot. 1874, p. 332; Leiht 



