Peck: New species of fungi 219 



On moss, Pogonatum alpinum Roehl. South Windsor, Connec- 

 ticut, September, 1904. C. C. Hanmer. The specimens are sterile, 

 but the species may be recognized by the described characters. 

 The dimensions here given are those of the dried specimens and 

 may be a little less than those of fresh plants. 



Monilia Avenae 



Minute, amphigenous ; hyphae short, about 8 p. thick, effused 

 on oblong or subelliptic, indefinite, pallid or brownish spots, grayish 

 or grayish-brown ; spores cat nulate, oblong or elliptic, slightly 

 colored, 25-40 [i long, 12-15 broad. 



Living or languishing leaves of some unidentified species of 



Avena* Near Los Gatos, California. February, 1904. A. A. 



Heller. " The wild oat plants here are often badly infested by this 



fungus and the young plants on which it appears have their growth 



checked and they seem never to reach maturity." — A. A. H. 



Marsonia Potentillae Helleri van no v. 



Spots small, inconspicuous, angular, pallid ; acervuli unequal, 

 irregular, single or sometimes two or three on a spot, black ; 

 spores oblong, 20-24 fi long, about 4 fi broad, the upper cell 

 abruptly narrowed into an oblique beak, both cells destitute of 

 guttulae. 



Living leaves of Drymocallis glandulosa (Lindl.) Rydb. Near 

 Los Gatos, California. May, 1904. A. A. Heller. The paler in- 

 conspicuous spots of the leaves, darker-colored acervuli, and more 

 narrow spores without oil globules distinguish this variety from the 



species. 



Haplosporella commixta 



Perithecia single or clustered, numerous, thin, globose, erum- 

 pent, black ; spores broadly elliptic or obovate, colorless when 

 young, becoming dark-brown (by transmitted light) when mature, 

 24—32// long, 16-20 /j. broad. 



Bark of dead branches of slippery elm, (Jim us fulva Michx. 

 Stockton, Kansas. January, 1905. E. Bartholomew. 



The specific name is suggested by the commingling of pustules 

 containing a single perithecium with others containing two or more. 

 This feature of the species shows the intimate relation between the 

 genera Sphaeropsis and Haplosporella, and the species may be con- 

 sidered a connecting link between the two genera. 



