99 



EPHEBACEI. 



[ettopsis. 



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

 Ib70, 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 gelatino-cellular, nodulose and variously arranged syngonimia ; 

 medullary filaments wanting. Apothecia small or minute, lecano- 

 rine or pyrenocarpous, paraphyses jointed or simple ; spores Snse, 

 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 witli them. Both genera of 

 wliich it consists occur in Uritain, ard 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 crus- 

 taceous, fragile, 



granulate - areolate : 

 gonimia simple or 

 several in nodulose 

 syngonimia. Apo- 

 thecia lecanorine, 

 small or moderate, 

 paraphyses articu- 



Fig. 3. 



late; spores 8na3 ; ^-wo^.^es ^«?M«/f«Nyl.—«. Section of the thallus, x 200. 



hymenial gelatine b. Two gonimia, x 350. c. Two syngouiiuia, 

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

 tion of part of hvmeniura, with theca and para- 

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

 sperm ogone, X 30. h. Sterigmata and spermatia, 

 X 500. 



bluish with iodine. 

 Spermogones with 

 oblong minute sper- 

 matia. 



The old genus Pi/renopsk Njd. 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 Pt/renoj)sis by the lecanorine 

 apothecia and the jointed paraphyses. 



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

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

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

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

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

 hyraenial gelatine, especially the theeae, deep-blue with iodine. — ■ 

 Cromb. Grevillea, xv. p, 10. — Pi/renopsis luemalea Nyl., Strn. 

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



