84 The North American Cup-Fungi 



17. Sclerotinia sativa Drayton & Groves, Mycologia 35: 526. 

 1943. 



Sclerotia black, irregular in shape, usually more or less 

 circular to elongated, 1-5 mm. in length or rarely longer and 1-2 

 mm. thick, frequently becoming laterally fused and forming 

 irregular crusts not adhering closely to the substratum. 



Apothecia appearing singly, or in clusters, stipitate, reaching 

 a diameter of 1-5 mm., shallow cup-shaped to almost plane, or 

 finally convex, slightly hairy to almost glabrous; hymenium 

 concave to plane or convex, brown; stem reaching a length of 

 2-6 mm., tapering downward less than 1 mm. thick, dark-brown 

 to almost black at the base; asci cylindric with a slender tapering 

 base, reaching a length of 100-130 /x and a diameter of 7.5 10 /x; 

 spores ellipsoid to ovoid, hyaline, 1 -seriate, 4-7 X 9 12 n; pa- 

 raphyses filiform, septate, simple or branched, 2.5 3.5 n thick, 

 the tips enlarged to 4-5 jjl; spermatia present. 



On bulbs of Tulipa and roots of Medicago sativa, Melilofus 

 alba, and Melilotiis officinalis. 



Type locality: New York. 



Distribution: New York to Quebec and Alberta, Canada. 



Illustrations: Mycologia 35: 520,/. /, 7; 525,/. 8. 



Doubtful Species 



Sclerotinia incondita (Ellis) Sacc. Syll. Fung. 8: 200. 1889; Peziza in- 

 condita Ellis, Bull. Torrey Club 8: 73. 1881. Apothecia occurring on sclerotia 

 the origin of which was undetermined; asci 4-spored; spores 7-8 X 10-12 m- 

 Distributed by Ellis (N. Am. Fungi 391). Nothing more is known of this 

 species. 



Sclerotinia wisconsinensis Rehm, Ann. Myc. 6: 317. 1908. Occurring 

 on unattached sclerotia in the soil in Wisconsin. This appears to be close to 

 Sclerotinia tuberosa. 



12. CIBORIA Fuckel, Symb. Myc. 311. 1870. 



Stroma a sclerotium, mummiform, occurring in the flowers or 

 fruits of the host which retain much their original form scarcely 

 suggesting a sclerotium; spermidium often present, manteling 

 the developing sclerotium; spermatia globose, or ovoid, hyaline, 

 in mass faintly yellowish; conidia unknown. 



Apothecia cupulate to shallow saucer-shaped, often becom- 

 ing flat, expanded or even reflexed, usually some shade of brown, 

 rarely red, yellow, or whitish, medium sized; asci cylindric or 



