246 FUNGUS-FLORA. 



physes hyaline, about 2 /x thick, tips slightly thickened or 

 not at all. 



Peziza salicella, Fries, Syst. Myc., ii. p. 133. 



On willow branches. 



Specimen in Sydow's Myc. March., n. 578, examined. 



AYhen the bark is still present the ascophores appear to 

 be almost sessile ; but when the bark has fallen away, or is 

 removed, the stem is seen. The periphery of the stem and 

 excipulum, examined superficially, appear to be truly pa- 

 rencbymatous, and consisting of oblong cells, 12-20 x 8-10 /x, ; 

 but when examined carefully it is seen that these cell rows 

 separate laterally, and are not organically joined as in true 

 parenchyma. 



Helotium virgultorum. Karst., Myc. Fenn., i. p. 100 ; 

 Eehm, Krypt.-Fl., Disc. p. 782. 



Gregarious, stipitate, at first subglobose and closed, at 

 length expanding until plane or slightly convex, tough, 

 margin entire ; disc yellow, often tinged with red, at length 

 rufous; externally glabrous, pale, 1-4 mm. broad; stem 

 2-8 mm. long, up to \ mm. thick, cylindrical, pale, subfloc- 

 culose ; hypothecium and excipulum hyaline, formed of 

 slender, interwoven hyphae ; cortex minutely parenchy- 

 matous ; asci clavatc, slightly narrowed at the apex, 8-spored ; 

 spores irregularly 2-seriate, narrowly elliptical, ends rather 

 pointed, or apex rounded and hence very narrowly clavate, 

 straight or very slightly curved, hyaline, smooth, at first 

 continuous, finally 1-septate, 35-25 x 4-5 p.; paraphyses 

 slender, hyaline, only very slightly thickened at the tip. 



Peziza viryultorum, Vahl, Flor. Dan., tab. 1016, fig. 2. 



Hymenoscyplia virgultorum, Phil., Brit. Disc., p. 134. 

 h > Phialea virgultorum, Sacc., Syll., viii. n. 1100. 



On dead twigs and branches of various trees. 



Var. fructigenum. Rehm, Krypt.-Flora, Disc., p. 783. 



Differs from the typical form in having a shorter and 

 more slender stem, narrowed downwards, and with a minute 

 white downiness at the base. 



Peziza fructigena, Bull., Hist. Champ. Fr., p. 236, tab. 228. 



Hymenoscyplia fructigcna, Phil., Brit. Disc., p. 135. 



Phialea frucliyena, Sacc., Syll., viii. n. 1097. 



