64 FUNGUS-FLORA. 



livid, soon blackish-brown. On small twigs the ascophores 

 are usually elongated in the direction of the long axis of 

 the stem on which they are growing, but on thicker branches 

 they are arranged at all angles. 



Specimen from Fries' Scler. Suec, n. 40, examined. 



XYLOGEAPHA. Fries, (figs. 42-44, p. 22.) 



Ascophore narrow and elongated, imperfectly mavginate, 

 waxy ; disc widely exposed at maturity, thickish, brownish ; 

 asci clavate, 8-spored ; spores elliptical, continuous, hyaline, 

 smooth, biseriate ; paraphyses present. 



Xylographa, Fries, Syst. Myc., ii. p. 197; Sacc., Syll., viii. 

 p. 664; Eehm, Krypt.-Flora, Disc., p. 153; Leighton, Lichen- 

 Flora of Great Brit., p. 390. 



Xylographa parallela. Fries, Syst. Myc., ii. p. 197; 

 Kehrn, Krypt.-Flor., Disc., p. 153 ; Leighton, Lichen- Flora of 

 Gt. Brit., p. 391. (figs. 42-44, p. 22.) 



Gregarious, sessile, innate, erumpent, elongatedj lying 

 parallel between the fibres of the wood, blackish brown, in- 

 ternally greyish, |-3 mm. long, disc closed at first, then open 

 and plane or slightly convex ; asci clavate, apex obtuse, 

 8-spored ; spores elliptical, ends obtuse, straight or very 

 slightly curved, smooth, hyaline, continuous, with 1 large 

 or 2 small guttulae; 11-16 X 6-7 /*, irregularly biseriate; 

 paraphyses septate, gradually becoming thicker upwards, 

 apex about 5 /u, thick, brown. 



Opegrapha parallela, Ach., Lich. Univ., p. 253. 



Stictis (Xylographa} parallela, Cke., Hdbk., p. 736. 



On weathered wood. 



Forming minute, black, parallel, straight or slightly [curved 

 black streaks, nestling between the fibres of the wood. 



Far. pallens, Nyl., Lich. Scand., p. 230 ; Leighton, Lich.- 

 Flora, p. 390. 



Ascophore becoming pale. 



On old wood. 



Specimen examined in Fries' Scler. Suec., n. 95. 



