Davis — Parasitic Fungi in Wisconsin — I. 83 



on this host collected at Ithaca, N. Y., by Higgins (com. Barthol- 

 omew) bear both this and form 3 on the same leaves. 



After this was written a collection was made from the exami- 

 nation of which the following characters were noted : spots angu- 

 lar-suborbicular, at first brown with a narrow darker margin, 

 then grey and finally mottled with small angular cream colored 

 areas, sometimes confluent, 2-3 mm. in diameter ; pycnidia mostly 

 hypophyllous and inconspicuous, 65-75/x. in diameter; sporules, 

 hyaline, filiform, acute, 3-6 septate, 38-60 x 2 1 /2-3 1 / />^. On Popu- 

 lus grandidentata. Devils Lake, Wisconsin, Aug. 6, 1913. 



In this connection a still more recent (Aug. 21, 1914) collec- 

 tion on Popidus deltoides is of interest. PJiyllosticta populina 

 Sacc. is said to occur in association with Septoria populi Desm. in 

 Europe. Having made a collection of the former at Prescott the 

 associated Septoria was examined with some interest. The spots 

 are orbicular, cinereous with a narrow dark margin and re- 

 semble those of form 2 except in the grey color which in the 

 older spots changes to white. On some of the leaves are small 

 angular, confluent spots like those of typical Septoria musiva 

 Pk. Of the first mount from this material it was noted "spor- 

 ules mostly 18-22 x 2-3/a, 1-2 septate with occasional longer ones 

 up to 48/x and 3-septate " ; of another mount ' ' 30^15 x 2-3/x, 

 2-3 septate". This seems to connect with the forms described 

 above and suggests that there is a widely variable species of 

 Septoria occurring on Popidus in both America and Europe. 

 Septoria Candida (Fekl. ?) Sacc. I have not seen, but the des- 

 cription indicates that it might readily fall in with the Ameri- 

 can forms. 



Cercospora geranii Kell. & Sw. Of a specimen collected at 

 Blue Mounds the following notes were made. Hyphae usually 

 straight, slightly colored, often toothed, 25-75 x 6-7/*; conidia 

 hyaline, cylindrical, usually more or less curved, obtuse, becom- 

 ing pluriseptate, 100-165 x 4-5/*. 



Cercospora snbsanguinea Ell. & Evht. is sometimes devoid of 

 color and the obtuse conidia sometimes divide in the middle. It 

 appears to be more nearly a Ramidaria. 



Gloeosporium fragariae (Lib.) Mont. My notes of the 

 measurements of the sporules of the fungus referred to this spe- 

 cies range from 12-24 x 4-5//.. It was collected at Spooner. 



