262 Wisconsin Academy of Sciences, Arts, and Letters. 
the state. On our more valuable species of pine, Finns 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 Feridermium comptoniae Orton & Adams. 
Aecidium maianthae Schum. On Maianthemum canadense. 
Solon Springs. This is probably the aecial stage of the rust on 
Phalaris arundinacea that was 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 hyperboi'ea. 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 Celtis Occidentalis. 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 Primus 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, yel- 
