104 Wisconsin Academy of Sciences, Arts, and Letters. 
of tliis species from the previous lists. It some¬ 
times occurs in considerable abundance on Carex 
Pennsylvania. 
656. Tracya lemme, (Seteh.) Sydow. 
(Cornuella l&mnae, Seteb.) On Spirodela poly- 
rrhiza, Scbeid. Genoa Junction. Tbis occurred 
on the inner margin of tbe “lagoon” at Powers 
lake but I failed to find it at any other point around 
tbe lake. A search for it tbe following year was 
fruitless. 
657. USTILAGO OLIVACEA, (DO.) Till. 
On Carex utriculata, Boott, Vilas county. I 
have not compared tbis witb authentic specimens. 
In my copy of Sydow’s Ustilagineen tbe specimen 
so labeled is Cintractia caricis, (Pers.) Magnus. 
Prof. Clinton bas since authenticated a Wisconsin 
specimen. 
658. USTILAGO PEEEYS'ANS, Bostr. 
On Arrhenatherum avenaceum, Beauv. Abun¬ 
dant in a field of Bromus inermis witb the seed of 
which the host and smut bad apparently been in- 
. troduced. 
659. Ustilago utriculosa, (Bees.) Tul. 
On Polygonum hydro piper oides, Micbx. Bacine. 
This smut appears to be rare in Wisconsin. 
659a. Ustilago macrospora, Desm. on^ Agropyrum repens, 
Beauv. and 
659b. Ustilago oxaldis. Ell. & Tracy. 
On Oxalis corniculata, L. var. stricta, Sav. Be- 
ported from 1 Wisconsin in Clinton’s list of North 
American Ustilagineae. (Journal of Mycology, 
8-63. 
660. Clado c h ytrium mac glare, (Wallr.) ( Physoderma mac- 
ulare, Wallr. Cladochytrium alismatis, Busgen.) 
On Alisma Plant ago, L. Kenosha county and 
Bacine. In 1898 about forty leaves bearing this 
