SCLEROTINIA. 279 



slender, hyaline, septate, about 2' 5 p thick at the tip, some- 

 times branched. 



Sclerotinia pseudotuberosa, Eehm, Krypt.-Fl., Disc., p. 803, 

 figs. 1-5, p. 800. 



Hymenoscypha pseudotuberosa, Phil., Brit. Disc., p. 119, pi. 5, 

 fig. 25. 



On fallen, decayed acorns. 



Specimen examined in Kehm's Ascom., n. 106 A, B. 



SCLEROTINIA. Fuckel. 



Ascophores solitary or gregarious, springing from a sclero- 

 tium, stipitate, at first minute and closed, (gradually growing 

 and expanding, until finally almost or quite plane, glabrous, 

 brown; hypothecium and excipulum formed of intricately 

 wefted hyphae ; asci elongated, narrowly cylindrical, 

 8-spored; spores obliquely 1-seriate, hyaline, smooth, con- 

 tinuous ; paraphyses present, slender. 



Sclerotinia, Fuckel, Symb. Myc., p. 330 ; Sacc., Syll., viiL 

 n. 195. 



Hymenoscypha, Phillips, Brit. Disc. 



Peziza, of many authors. 



Closely allied to Giboria, differing more especially in 

 growing from a sclerotium.j In some species a conidial 

 condition is known, belonging to the form-genus Botrytis. 



* Growing on Dicotyledons. 



Sclerotinia tuberosa. Fckl,, Symb. Myc., p. 331; 

 Kehm, Krypt.-Flora, Disc., p. 814, figs. 1-5, p. 802 ; Sacc., 

 Syll., viii. n. 797. 



Ascophores 2-6 springing from an irregularly elliptical or 

 subglobose sclerotium up to 3 x 1*5 cm., buried in the 

 ground, externally black, inside white; ascophore at first 

 pear-shaped and closed, then funnel-shaped, finally becoming 

 almost plane, bright brown, edge entire, thin, 13 cm. across ; 

 hypothecium and excipulum, consisting of pale brown, 

 sparsely septate, branched, intricately interwoven hyphae, 

 cortex similar in structure, darker brown; stem 2-7 cm. 

 long, 1 5-3 mm. thick, often flexuous, brown ; asci cylindri- 



