262 Wisconsin Academy of Sciences, Arts, and Letters. 



the state. On our more valuable species of pine, Pinus Strobus 

 and P. resinosa, no rust has been observed in Wisconsin, and it 

 is hoped that none will be introduced. 



Filamentous processes from base to apex of the peridium oc- 

 casionally occur in Peridermium comptoniae Orton & Adams. 



Aecidium maianthae Schum. On Maianthemum canadense. 

 Solon Springs. This is probably the aecial stage of the rust on 

 Phalaris arundinacea that Avas recorded under the name Puc- 

 cinia sessilis Schn. in the provisional list. While collecting it a 

 single sorus, but a well developed one, was found on Streptopus 

 roseus. Under similar circumstances I once found a single sorus 

 on Habenaria hyperborea. Such occurrences seem significant as 

 to the relation of the segregates from Puccinia sessilis Schn. 

 This was erroneously given the name Aecidium smilacinae 

 Schum. in the provisional list. 



Aecidium ranunculacearum DC. In small quantity on Ran- 

 unculus abortivus at Solon Springs where it occurred abund- 

 antly on Anemone quinquefoila. The infection of the former 

 host seems to be very exceptional. 



ADDITIONAL SPECIES. 



Not reported in the Wisconsin lists. 



Uncinula parvula Cke. & Pk. On Cellis Occident alis. Madi- 

 son. 



Exoascus betulinus (Rostr.) Sadeb. On Betula alba papyri- 

 fera. Solon Springs. This was seen on but a single tree and 

 confined to a single branch. 



Exoascus communis Sadeb. On fruit of Prunus cuneata. 

 Millston, Solon Springs and Boulder Junction. Abundant in 

 the former locality in 1914. Exceptionally this attacks petioles 

 and young leaves which are deformed thereby. 



Taphrina flava Farl. On Betula alba papyrifera. Ellison 

 Bay. I am indebted to Dr. Farlow for authentic material of 

 this species for comparison. My notes of the Wisconsin collec- 

 tion were as follows : Affected areas subcircular, indefinite, ycl- 



