142 



Mycologia 



many leaves on this plant and infection had spread naturally 

 also. As the leaves died and fell to the ground they began to 

 develop pycnidia. The perfect stage has not yet been found on 

 Rhus. 



Sclerotiopsis pelargonii . Scalia has been reported on Pelar- 

 gonium leaves. As it was impossible to obtain a specimen of this 

 species to compare with the pycnidial stage of Pezizella which ac- 

 cording to the description it appears to resemble closely, several 

 leaves of rose geranium {Pelargonium capitatum) were inocu- 

 lated by puncturing and spraying with conidia obtained orig- 

 inally from a single ascus culture from Pezizella Oenotheras 

 The plant was kept under a bell-jar for four days and well aired 

 and sprayed with water. Blackish streaks soon began to spread 

 along the veins of several of the leaves where punctured. On 

 September n sporodochia of Haniesia appeared and on Sep- 

 tember 14 most of the infected leaves bore typical pycnidia of 

 Sclerotiopsis. A comparison of 'these pycnidia with Sclerotiopsis 

 pelargoni Scalia will be made later. Scalia drew his description 

 from specimens which developed on leaves kept in a damp cham- 

 ber and does not mention finding any other form of fungus on 

 the leaves. 



On September 5, Dr. Neil E. Stevens found at North Liver- 

 more, Maine, on living leaves of Epilobium spicatum spots bear- 

 ing sporodochia of Pezizella. Cultures made from this form 

 differed in no way from those from other hosts. The leaves 

 bearing conidia were placed in damp chambers from September 

 9 to 14 when they showed an abundance of the pycnidial form of 

 the fungus. If leaves of any one of the host species upon which 

 sporodochia are found are placed in a damp chamber for a week 

 or two and kept fairly moist, pycnidia usually develop. 



A hill of dewberries at Cameron, N. C, sprayed with conidia 

 from dewberry, May, 1919, showed no signs of sporodochia on 

 leaves or stems during the next two weeks, although berries 

 picked from this hill developed many sporodochia. These vines 

 were cut in July, kept in a warm, dry laboratory until April, 

 1920, and then placed on the ground in the woods. On July 25 

 they were examined. The leaves, fruit stalks and many of the 



