Preliminary List of Wisconsin Parasitic Fungi. 119 



97. Cercospora physalidis Ell. 



On leaves of two species of Physalis. La Crosse, Pammel. 



98. Cercospora pyri Farlow. 



On leaves of Pyrus arbutifolia L. Kilbourn City, Pammel. 



99. Cercospora granuliformis Ell. & Holway. 



On leaves of Viola cucuUata Ait. Madison; La Crosse, and Hokah, 

 Minn., Pammel. 



Polijthrincmm trifolii TS.Z3. — Sae Ptiyllachora trifolii, No. 5L 



99a. Cladosporium triostei Pk., n. sp. 



On leaves of Triosteum perfoliatum L. La Crosse, Pammel. 

 Spots indefinite, pale, becoming brown at the center with age; 2-5 mm. 

 in diameter. Conidiophores tufted, slightly wavy, hypophyllous, 125-150/t 

 long, 3.5/-< in diameter, deep brown. Spores dark brown, sometimes 

 slightly ]^&\ev than the threads; lemon-shaped, with strongly pronounced 

 papillae at either end; 2-celled; 5-7x15-20/^. Septum usually central, 

 sometimes near one end. 



100. Passalora depressa (B. & Br.) {Cladosporium depressuvi B. 



& Br.). 

 On leaves of Zizia integerrima D C. and Archangelica atropurpurea 

 Hoffm.? La Crosse, Pammel. 



101. FusiCLADiUM DENDRITICUM (Wall.) (CladospoHum dendriticum Wall.). 



On leaves and fruit of Pyrus malus L., P. coronaria L. and P. pruni- 

 folia L. Madisan, Ithaca; Baraboo, Johnson; La Crosse, Pammel; 

 and reported all over the state. 

 The cause of " leaf -blight " and " scab" of apples, and very destructive. 



102. Pyricularia grisea (Cke.) {Trichothecium griseum Cke.). 



On the leaves of Panicum sanguinale L. Syene, Madison. 

 Causing gray spots; common, in the fall. 



103. Trichothecium roseum Fr. 



On a living puff-ball in August. Madison. 

 Very possibly growing as a saprophyte on an injured part of the fungus, 

 as it occurs the year round on firewood, old black-knots of cherry, etc. 



104. Sepedoxium chrysospermum Link. 



On a species of Boletus. M-^dison. 

 Although the host was almost entirely replaced by the conidia, as usual, 

 there was no indication of ascosporic fruit. 



105. Asterixa, sp. (?). 



On leaves of Salix. in fall. Syene. 

 Forming dendritic black spots several millimeters in diameter. Too im- 

 mature for determination. 



