Davis—Notes on Parasitic Fungi in Wisconsin — IV. 679 
Septoria erigerontis Pk. On Erigeron canadense, Long Lake. 
There is much diversity in Septoria on Erigeron. In this col¬ 
lection the pycnidia are scattered through indefinite, somewhat 
paler areas which become confluent and mottled with small 
(2-4 mm.) indefinite, dead spots before the death of the entire 
leaf. The sporules are subarcuate, 21-38x1 %-2 /a and appear 
rigid. At the other extreme is Fungi Columbiani 1680 on the 
same host species with definite small (1 mm.) white-arid, con¬ 
spicuously bordered spots bearing each one or two pycnidia 
containing sporules that are usually narrow (1-1%/x) lax and 
thread-like. I have labeled the Long Lake collection var. 
effusa n. var. 
Phleospora aceris (Lib.) Sacc. On Acer saccharinum. Wis¬ 
consin river bottoms opposite Bridgeport. 
Gloeosporium nervisequum (Fckl.) Sacc. On Platanus oc¬ 
cidentals. From a tree on the university campus. (H. R. 
Rosen.) 
Marssonina castagnei (Desm. & Mont.) Magn. On Populus 
balsamifera. Laona. 
Cylindrosporium saccharinum Ell. & Evht. On Acer spica- 
tum. Athelstane. Sporules 30-40 x crescentic, 3-septate, 
borne in imperfect pycnidia. Doubtfully distinct from Phleo¬ 
spora aceris (Lib.) Sacc. 
The fungus that was reported in Notes II under the name 
Cylindrosporium vermiforme Davis has been collected at Mills- 
ton on Corylus americana. The larger sporules are Qy in 
diameter. 
Bamularia uredims (Yoss) Sacc. On Populus deltoides. 
Madison. On Salix cor dad a. Lynxville. Parasitic, together 
with Barium filum (Biv.) Cast., on Melampsora. 
Ramularia . multiplex Pk. On Vaccinium Oxycoccus. Solon 
Springs. 
Septocylindrium concomitans (Ell. & Hals.) Hals. On Bidens 
vulgata. Ladysmith. 
