64 FUXGUS-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 marginate, 

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

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

 smooth, biseriate; paraphyses present. 



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

 p. 664; Eehm, Krypt.-Flora, Disc, p. 153; Lei ghton, 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, J,— 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 /x, irregularly biseriate; 

 paraphyses septate, gradually becoming thicker upwards, 

 apex about 5 /x thick, brown. 



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



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



On weathered wood. 



Forming minute, black, parallel, straight or slightlyVurved 

 black streaks, nestling between the fibres of the wood. 



Var. 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. 



