56 FUNGUS-FLORA. 



i 1 mm. long, dehiscing by a longitudinal slit : asci clavate, 

 apex obtuse, 8-spored ; spores irregularly biseriate, elliptic- 

 oblong, ends rather obtuse, straight or very slightly curved, 

 hyaline, 1- septate, smooth, 8-9x2-5-3 //, ; paraphyses 

 slender, more or less branched, 3 /j. thick above, colourless. 



Sphaeria aquilina, Fries, Syst. Myc., ii. p. 523. 



Hysterium aquilinum, Schum., Saell., ii. 158. 



Hypoderma aquilinum (Schum.), Sacc., Syll., ii. n. 5802. 



On dead f i onds and rachis of bracken (Pteris aquilina). 



Appearing to the naked eye as minute, black, roundish or 

 elongated points. 



PHACIDIUM. Fries, (fig. 21, p. 12.) 



Ascophores scattered, at first buried completely in the 

 substratum, or only innate, depressed-globose, peltate ; ex- 

 cipulum blackish, minutely parenchymatous, firm, usually 

 connate with the epidermis of the host and continuous at 

 first, then splitting from the centre in a radiate manner into 

 a number of more or less acute teeth, and exposing the disc ; 

 asci clavate, apex usually narrowed, 8-spored ; spores hyaline, 

 continuous, smooth, longish and narrowly elliptical or fusi- 

 form, 2-seriate rarely 1-seriate ; paraphyses slender, colour- 

 less ; hypothecium pale. 



Phacidium, Fries, Obs. Myc., i. p. 161 ; Phil., Brit. Disc., 

 p. 387 ; Kehrn, Krypt.-Flora, Disc., p. 66 ; Sacc., Syll., viii. 

 p. 709. 



Allied to Coccomyccs, but distinguished by the shorter 

 spores being irregularly 2-seriate, or rarely 1-seriate, but 

 never arranged in a parallel bundle or fascicle in the upper, 

 wide part of the ascus. 



Phacidium multivalve. Kze. & Schmidt, Mycol., 

 Heft i., p. 42 ; Sacc., Syll., n. 2904. 



Gregarious, subinnate, 1-2 mm. across, blackish, splitting 

 above into 46 teeth, disc pale ; asci clavate, apex somewhat 

 truncate ; spores 8, narrowly elliptic-fusiform, straight, 

 continuous, usually 2-guttulate, hyaline, 9-10 x 3-4 p,, bise- 

 riate ; paraphyses cylindrical, about 2 5 p. thick, colourless. 



Phacidium ilicis, Phil, Brit. Disc., p. 390. Stylospores. 

 Stroma, containing 3-5 cells, orbicular, plane, black, shining, 



