172 



Mycologia 



Sclerotinia Fagopyri S. Hori sp. nov. in Byochu-gai Zasshi 

 (Journ. Plant Protection) 3 3 : 171-175. Mar. 1916. (Japa- 

 nese.) 



Sclerotia orbicular, ellipsoid, oblong, or ovoid, 2-3 X 2-4 mm., 

 surface black, inner tissue rose colored ; apothecia one or two from 

 a sclerotium, cinnamon-brown, 3 mm. in diam., somewhat cupu- 

 late, stipitate, stipes 3-5 mm. in length ; asci cylindrical, slightly 

 curved, 135-155 Xg-11 fi; ascospores eight, obliquely monostich- 

 ous, 11-14X6-8/X, guttulate near each end; paraphyses filiform 

 or clavate, slightly longer 'than the asci, 2-2.5 P m diam., 2-4 

 (usually 2-3) septate. 



The sclerotia form inside of the seeds of Fagopyrum escu- 

 lentum and probably germinate twice a year. The diseased seeds 

 sink in brine of 1.12 to 1.20 sp. gr., while healthy seeds float. 

 They alone should be planted. 



Bureau of Plant Industry, 

 Washington, D. C. 



