ASCOMYCETES 381 



slightly smaller ; paraphyses slightly clavate, tips brownish. 

 Conidia Oidium-Vke. Forming a delicate white mould 

 on leaves and twigs. Conidia in chains, lemon-shaped, 

 31-32 X 19-25 p.; disjunctors present. 



Sclerotinia baccarum, Rehm, Hedw., 1885, No. i. 

 Ascophores usually 2-3, from a sclerotium, brown, 3-10 mm. 

 broad, narrowed into an often crooked, dark stem 0-5-5 cm - 

 long; asci cylindrical, 120-150X10-12 /x, 8-spored, four of 

 which are only perfect as a rule, elliptical, ends obtuse, 

 18-21X9-11 p; paraphyses septate, clavulate. 



Conidial form Oidium-like, forming a white mould on 

 the concave side of curved branches, concatenate, nearly 

 globose, with disjunctors. 



Sclerotinia megalospora, Woronin, Mem. Acad. St. 

 Petersb., 1888, vol. xxxvi. No, 6, p. 35, pi. 9, 10. Asco 

 phore solitary, or sometimes two springing from the fruit- 

 sclerotium, dark brown, 3-7 mm. broad ; stem very slender, 

 2-4 cm. long ; asci cylindrical, very large, 8-spored ; spores 

 elliptical, 19-25X14-16 fj.; paraphyses stout, branched 

 above, septate. 



Conidia Oidium-\\ke, forming a greyish hue on the nerve 

 of the under side of the leaf, produced in chains, globose, 

 24-30 p. diam. ; disjunctors minute. 



* * Ascigerous form only known. 



Sclerotinia sclerotiorum, Massee, Brit. Fungus-Flora, 

 iv. p. 280. Solitary or 2-4 ascophores springing from a 

 black, usually elongated, often irregular sclerotium 1-2 cm. 

 long ; at first small and closed, expanding until almost plane, 

 pale brown, 3-7 mm. broad ; stem slender, 1-3 cm. long ; 

 asci narrowly cylindrical; spores 8, elliptical, 9-13X4-6 p, 

 paraphyses slender. 



