SCLEROTINIA 77 



Apothccia usualh but one from each sclerotium, long- 

 stipitate, thin membranous, shallow, cup-shaped, subumbilicate, 

 4-5 n in diameter, reddish-brown ; stem relatively long, reaching 

 a length of 1 cm. and a diameter of 1 mm. attached below by a 

 spreading, dark hyphal mat; asci clavate-cylindric, reaching a 

 length of 60 n and a diameter of 4-5 n, 8-spored ; spores allantoid, 

 slender, distinctly curved, hyaline, 1-1.5 X 8-9 n; paraphyses 

 not apparent. 



In culms of Juuchs (probably /. effusiis var. californica). 



Type locality: Falcon Valley, Washington State. 



Distribution: Known only from the type locality. 



4. Sclerotinia Caricis-ampullaceae Nyberg, Mem. Soc. Fauna 

 Fl. Fenn. 10: 22. 1933. (Plate 90.) 



Sclerotia externalh' black (inside white), longitudinally sul- 

 cate, bowed or S-shaped, usually broader below and tapering 

 above, the bow often variable, reaching a length of 1-10 cm. and 

 a diameter of 1 mm. to 1 cm., each producing one to twenty 

 apothecia. 



Apothccia stipitate, often funnel-shaped at first, later cup- 

 shaped, finally expanding and becoming nearly flat and umbili- 

 cate, reaching a diameter of 2-4 cm., externally finely tomentose, 

 some shade of brown; hymenium concave to plane, brown; stems 

 1-2 mm. thick and reaching a length of 5-10 cm., gradually 

 expanding above into the cup, darker below, almost black; asci 

 cylindric, rounded above, reaching a length of 200-300 ju and a 

 diameter of 11 m; spores 1-seriate, ellipsoid, smooth, without oil- 

 drops, 6-9 X 11-15 ix; paraphyses thread-like, branching below, 

 1-2 yi thick, scarcely enlarged above. 



In culms of Carex aqnatilis, C. ampuJIacea (C. rostrata) and C. 

 inflata . 



Type locality: Europe. 



Distribution: Medicine Bow Mountains, Wyoming; also in 

 Europe. 



Illustrations: Mycologia 35: 387, /. 1; 393, /. 2-3; 395, 

 /. 4-6; Farlowia 2: 406, pi. 6 J. 23-25. 



5. Sclerotinia paludosa Cash & Davidson, Mycologia 25: 271. 



1933. 



Sclerotia on leaves of host, often on edges, inconspicuous, 

 3-1 mm. in diameter, sometimes elongated up to 1.7 mm., black. 



