6i rUNGUS-FLOEA. 



livid, soon blackisli-browu. On small twigs the aseopliores 

 are -usually elongated in ilie direction of the long axis of 

 the stem on which thej- are growing, but on thicker branches 

 thoy 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 marginate, 

 waxy ; disc widely exposed at maturity, thiokish, 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, Krvpt.-FJora, Disc, p. 153; Leighton, Lichen- 

 Flora of Great Brit., p. 390. 



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

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

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



Gregarious, sessile, innate, erumpent, elongated, lying 

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

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

 and i:)lane 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 /x, irregularly biseriate; 

 j)araphyses septate, gradually becoming thicker upwards, 

 apex about 5 fj, thick, brown. 



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



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



On weathered wood. 



Forming minute, black, parallel, straight or slightly^carved 

 black streaks, nestling between the fibres of the wood. 



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

 Flora, p. 390. 



Ascophore becoming i)ale. 



On old wood. 



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



