HELOTIUM. 259 



ends obtuse, 1012 X 56 /i; paraphyses slender, hyaline 

 slightly clavate. 



Hymenoscypha renisporum, Phil., Brit. Disc., p. 143. 



Ciboria renispora, Sacc., Syll., viii. n. 841. 



Cibaria Sydowiana, Eehm, Hedw. 1885, p. 226 ; Krypt.- 

 Flora, Disc., p. 758 ; Sacc., Syll., viii. n. 840. 



On fallen and decaying oak leaves, especially on the petiole 

 and veins. 



Specimens examined in Ellis, N. Amer. Fung., n. 2049, 

 and Eehm, Ascom., n. 802. 



Helotium punctiforme. Phil., Brit. Disc., p. 168. 



Scattered, sessile and attached by a central point, at first 

 globose then almost or quite plane, margin often slightly 

 wavy, thin, glabrous, whitish or yellowish, mm. across ;. 

 excipulum consisting of very slender, interwoven hyphae, 

 cortex parenchymatous, cells 56 p. diameter ; asci clavate r 

 apex narrowed, pedicel long, slender, 8-spored ; spores ob- 

 liquely 2-seriate, hyaline, continuous, linear-elliptical, 9-12 

 X 2 p; paraphyses slender, apex slightly thickened, hya- 

 line. 



Peziza punctiformis, Grev., Scot. Crypt. Flora, p. 63, 

 pi. 63. 



Pseudohelotium punctiforme, Sacc., Syll., viii. n. 1229? 



Pezizella punctiformis, Eehm, Krypt.-Flora, Disc., p. 664 ? 



On dead oak leaves. 



Species in Herb. Berk., Kew, accepted as typical. 



Helotium immutabile. Fckl., Symb. Myc., App. i. r 

 p. 50 ; Phil., Brit. Disc., p. 162 ; Sacc., Syll., viii. n. 986. 



Epiphyllous, scattered, sessile or narrowed into a very 

 short stem-like base, disc soon plane and discoid, circular or 

 slightly wavy, margin acute, glabrous, pale yellow, remain- 

 ing unchanged or with an amber tinge when dry, about 

 1 mm. acrobS, cortex composed of long, narrow cells arranged 

 in parallel series from base to margin ; asci narrowly clavate, 

 tapering gradually from apex to base, 8-spored ; spores 

 1-seriate, or irregularly 2-seriate upwards, hyaline, con- 

 tinuous, narrowly elliptical, ends rather blunt, 10-12 x 

 3-4 p. ; paraphyses hyaline, almost cylindrical, about 2 ^ 

 thick. 



S 2 



