420 Wisconsin Academy of Sciences , Arts , and Letters. 
should not be referred to Ramularia but belongs under the rubric 
Micronemeae. An undifferentiated hypha makes its way to a 
stoma where it bears upon its extremity a conidium. In surface 
view the conidia appear to be standing on end on the leaf sur¬ 
face. They are easily detached, hence in examining sections they 
are seen not in situ but floating free in the mounting fluid. A 
similar mode of development is found in the fungus to which 
Oudemans gave the name Marsonia secales and upon which Hein- 
sen founded the genus Rhynchosporium. To this genus therefore 
I would refer the fungus on Alisma and Sagittaria heterophylla, 
considering the bending of the apical portion of the conidium to 
one side in the type as of no more than specific import. Diedicke 
(Ann. My col. 10:479) states that the specimens of Septoria alis- 
matis Oud. that he has examined are of the same character as 
Ramularia alismatis Fautr., which is true of those that I have 
seen, including North American Fungi , second series, 3371 , col¬ 
lected in Canada by Dearness. Rhynchosporium Heinsen then, 
being emended to include all Mucedinaceae micronemeae hyalo- 
didymae, would contain at present two known species: 
Rhynchosporium secales (Oud.) n. comb. 
Marsonia secales Oud. 
Rhynchosporium gramimcola Heinsen 
Collected in Wisconsin on the following hosts by A. 0. John¬ 
son, J. G. Dickson, and C. Drechsler: 
JDactylis glomerata 
Agropyron repens 
Hordeum vulgare 
Hordeum distichum 
Hordeum hexastichum 
Secdle cereale 
Bromus inermis 
Rhynchosporium alismatis (Oud.) n. comb. 
Septoria alismatis Oud. 
Ascochyta alismatis Ell. & Evht. 
Ramularia alismatis Fautr. 
Didymaria aquatica Starb. 
On Alisma Plant ago-aquatica and Sagittaria heterophylla . 
Cylindrosporium bandysianum Sacc. on Alisma Plantago (Ann. 
My col. 12: 296) judging from the description is probably the same 
fungus. 
