96 NATUEAL HISTOKY BULLETIN 



From sclerotium in seeds of Tilia americana L. lying on the 

 ground, Mt. Pleasant, Iowa, April 16, 1906. F. J. Seaver. 



The above description is taken from the original without 

 material change, the description having been drawn from Iowa 

 material sent by the writer. The plants in external appearance 

 are very much like those occuring on the seeds of wild cherry 

 described below. 



Sclerotinia (Stromatina) seaveri Eehm, Ann. Myc. 3 : 519. 

 1905. 



Apothecia 1 or 2 from a single mummy, about 1 cm. high, 

 long stipitate, cyathoid, faAvn to Isabella color (R) ; stipe smooth, 

 slender, cylindrical, more or less tapering and frequently tomen- 

 tose below, 5 to 20 by 11 mm. without rhizoid-like organs; disc 

 at first closed then expanding saucer shaped, to convex and 

 umbilicate ; excipulum with a pseudoparenchymatous outer layer 

 aud a prosenchymatous medulla; asci cylindrical-clavate, 155 to 

 180 by 8 to 11/x, apex round, spores blue with iodine ; spores 8, 

 obliquely 1-seriate, ellipsoid, ends rounded, hyaline, continuous, 

 11 to 17 by 5 to 8/x; paraphyses scattering, filiform, slightly 

 wider at the tips, mostly simple, septate, hyaline. 



Chlamydospores {Manilla seaveri Reade n. f.) effuse, ash- 

 gray; epiphyllous sometimes later on twigs also, still later in 

 minute cespituloe on immature fruits citron-shaped, continuous 

 hyaline, 7 to 15 mostly 8 to 10^, in. long di- and trichotomously 

 branched chains with slender, fusiform disjunctors 3 or 4/x long. 



Sclerotia formed in mummified fruits. 



Parasitic on leaves, twigs and fruits of Prunus serotlna Ehrh. 

 growing by roadsides and along fences. Ithaca. N. Y., and Mal- 

 loryville, N. Y. Apothecia were collected in the latter part of 

 April and the first of May. Chlamydospores were abundant on 

 the leaves during the first part of June and on the fruit in July. 



The attention of the writer was first directed to this species by 

 Prof. P>. Shimek who collected a number of plants on the seeds 

 of the wild cherry, in March, 1905. in woods near Iowa City. 

 As this was the first occurence of any of the plants of this 

 genus, 1<» my knowledge, in the state it was of more than usual 

 interest. A search was made for more of the material and it 



