SCLEROTINIA 79 



7. Sclerotinia Duriaeana (Tul.) Rehm, Hedwigia 21: 66. 1882. 



(Plate 92.) 



Sclerotium sulcatum Roberge; Desm. Ann. Sci. Nat. III. 16: 329. 1851. 

 Epidochium ambiens Desm. .^nn. Sci. Nat. III. 20: 231. 1853. 

 Epidochium affine Desm. Ann. Sci. Nat. III. 20: 232. 1853. (in part). 

 Peziza Duriaeana Tui. Fung. Carp. 1: 103. 1861. 

 Sphacelia ambiens Sacc. Syll. Fung. 4: 666. 1886. 

 Hymenoscypha Duriaeana Phill. Brit. Discom. 115. 1887. 



Sclerotia one to three in each culm, when mature exposed by 

 the rupture of the epidermis along one or two faces of the culm 

 which thus weakened soon breaks over widening the slit and 

 allowing the sclerotia to fall, black, fusiform, much resembling 

 ergot, the sclerotia of Claviceps, often inequilateral, or slightly 

 curved in larger specimens, of variable size according to the host, 

 reaching a length of 20-25 mm. and a diameter of 3-4 mm. but 

 often smaller, 3-angled. 



Apothecia stipitate, reaching a diameter of 2-10 mm., deep 

 cup-shaped when young, expanded when mature, fawn-colored, 

 varying in size with the sclerotia from which they arise; stem 

 short, 5-20 mm. long; asci slightly attenuated below, reaching a 

 length of 150-180 m and a diameter of 7-11 fx, 8-spored; spores 

 1-seriate, long-ovoid, often inequilateral, 5-9 X 8-18 n; pa- 

 raphyses slender, slightly swollen at their apices. 



On Carex stricta, Carex prairea, Carex hystericina, Carex 

 riparia var. lacustris. Carex flava, Carex rostrata, Carex crinita, 

 and Carex nehraskensis. 



Type locality: Ithaca, New York. 



Distribution : New York and Oregon; also known in Europe. 



Illustrations: Mycologia 21: 21,/. 1; pi. 2, 3, 5, J. 14, 15, 16; 

 Farlowia 2^: pi. 1, 2, 3, 4 (as S. sulcata). 



Whetzel (Farlowia 2: 397) treats S. sulcata as distinct from 

 5. Duriaeana. 



8. Sclerotinia Tiliae Reade, Ann. Myc. 6: 114. 1908. 



Apothecia mostly solitary, cyathoid, long-stipitate, .5-1 cm. 

 high, Isabela color, 1-3 mm. in diameter; stem smooth, slender, 

 cylindric, .5 mm. or less thick; asci clavate-cylindric, reaching a 

 length of 140-170 M and a diameter of 8-10 m, 8-spored; spores 

 obliquely 1-seriate, ellipsoid, hyaline, simple, 4 5 X 9-11 juipara- 

 physes sparse, filiform, hyaline. 



From sclerotia in seeds of Tilia americana hing on the ground. 



