Peck : New species of fungi 337 



On bark of black willow, Salix nigra Marsh, River Forest, 



Chicago, Illinois. March. E, T. & S. A. Harper. 



Perithecia minuta, 0.5 mm. lata, numerosa, epidermide tecta, 

 erumpentia, nigra ; sporae subglobosae aut late ellipsoideae, i 



12 fix S-io /I. 



Sphaeropsis simillima 



Perithecia minute, 0.25-0.33 mm. broad, densely gregarious, 

 rarely 2-4 united in a tuft, erumpent, black ; spores elliptic or 

 oblong, obtuse, 20-25 /^ X 10-12 tt. 



On bark of silver maple, Acer saccharinwn L. River Forest, 

 Illinois. April. E. T. & S. A. Harper. 



The perithecia, being occasionally slightly tufted, show an 



intimate relationship with the genus Haplosporella^ but as the 



simple perithecia are much more numerous than the tufted, the 



species is here placed in the genus Sphaeropsis. The specific 



name is suggested by the great similarity between this species and 



Sphaeropsis fertilis Peck. 



Perithecia minuta, 0.25-0.33 mm. lata, dense gregaria, rare 

 caespitosa, erumpentia, atra ; sporae ellipsoideae vel oblongae, 

 obtusae, 20-25 // x 10-12 /«. 



DotMorella Celastri 



Perithecia cespitose, 2—20 in a cluster, commonly crowded, 

 erumpent, black, whitish within, unequal, subcoriaceous, subasto- 

 mous ; tufts 0.5-1 mm. broad; spores broadly elliptic or sub- 

 globose, hyaline or subhyaline, 5-8 {x x 4-5/^. 



On dead stems of bitter-sweet, Celasirns scandens L. River- 

 side, Illinois. March. E. T. & S. A. Harper. 



In some specimens there appears to be a slight stroma or a 

 few hyphae on which the perithecia are seated. The perithecia 

 are unequal in size and shape, 



Perithecia caespitosa, vulgo conferta, erumpentia, inaequalia, 

 subcoriacea, subastomata, atra, intus albida; caespites 0.5-1 mm. 

 lati ; sporae late ellipsoideae vel subglobosae, hyalinae subhya- 



linaeve, 5-8 p. x 4-5 Z^- 



Diplodina fusispora 



Perithecia 0.5-1 mm, broad, densely gregarious, sometimes 

 slightly cespitose, irregular or subglobose, erumpent, black ; spores 

 short-fusiform, acute at each end, hyahne, at first simple, then uni- 



seotate, 16-20// x 4-5 j«- 



