44 FUNGUS-FLORA. 



and contain hyaline niultinucleate spores, 22-25 x 8-10 /x, 

 borne on longish basidia. 

 Psilospora quercina, Rab. 



Dichaena faginea. Fries, Elench., ii. p. 141 ; Eehm, 

 Krypt.-Flora, Hyst., p. 51 ; Sacc., Syll., ii. n. 5737. 



Growing on living bark ; ascophore erumpent, becoming 

 rather prominent, oblong, at length forming effused, rugu- 

 lose patches. 



Hysterium fagineum, Rabh., Pilze, p. 155. 



On smooth, living beech bark. 



Resembling D. quercina in habit and structure, but the 

 perithecia are larger. 



Far. corylea, Fries, Elench. Fung., ii. p. 142 ; Sacc., Syll., 

 ii. n. 5737. 



Ascophore smaller, slightly prominent, somewhat rounded, 

 becoming confluent and forming prominent, rugulose patches. 



On hazel bark. 



Far. capreae, Rehrn, Krypt.-Flora, Disc., p. 51, figs. 3-5, 

 p. 49 ; Sacc., Syll., Suppl. ix. n. 4396. (fig. 12, p. 22.) 



Ascophores gregarious on pale, roundish spots, immersed, 

 bursting through the epidermis ; roundish then elongated, 

 obtuse, membranaceous, rugose, black, J mm. long, ^-^- mm. 

 broad; ostiolum at first roundish then elongated, margin 

 irregular, narrow ; asci fusoid, base broad, sessile, 8-spored ; 

 spores hyaline, continuous, usually 1-guttulatethen minutely 

 granular, elliptic-oblong, ends obtuse, 27-30 x 12-14 p.; 

 paraphyses filiform, 2-5 /j. thick, tinged brown above. 



On living bark of Salix capraea. 



Usually only 3-4 spores attain their full development in an 

 ascus. A doubtful Dichaena if the spores are permanently 

 continuous. 



Dichaena strobilina. Fries, Summa Yeg. Scand., 

 p. 40 ; Cke., Hdbk., p. 932, f. 406 ; Sacc., Syll., ii. n. 5738. 



Gregarious, erumpent, somewhat irregular, roundish at 

 first, rather soft, opaque brown then black, dehiscing by a 

 narrow longitudinal slit ; asci usually 8-spored ; spores 

 fusoid, slightly curved, 3-guttulate then 3-septate, hyaline, 

 smooth, 10-13 p. long. 



