Davis—Notes on Parasitic Fungi in Wisconsin — IX. 255 
americanum Farl. The collections on Ruhus triflorus however 
should be referred to the type while I find no specimens in the 
herbarium which I can determine as being on B. occidentalis. A 
specimen on this host collected by B. 0. Dodge in Wisconsin at 
Algoma was reported by Arthur as P. arcticum but' Dr. Arthur in¬ 
forms me that this was an error and that the specimen is of the 
americanum type which is not rare in Wisconsin on the red rasp¬ 
berry and that the host is B. strigosus. Arthur has proposed the 
raising of the variety americanum Pari, to specific rank (Bull. Torr. 
Bot. Club 47: 468) but certain forms on Bubus idaeus aculeatissimus 
having globose peridia seem closely allied to the type. 
aculeatissimus. 
Fig. 4. Section through a uredo sorus of Puceiniastrum on Bubus triflorus. 
Drawn by E. M. Gilbert with the aid of camera lucida. Pig-. 4 was drawn 
from a small sorus and the disparity in size is somewhat exaggerated. 
For the Abies-Salix rust recorded in ‘‘Notes” II & III under the 
binomial Melampsora arctica Rostr. Arthur proposes M. ameri- 
cana {Bull. Torr. Bot. Club 47;465--68.) Besides the localities 
which he gives the Caeoma has been collected in Wisconsin at 
Mountain and at Kelly lake in Oconto county and at Solon Springs. 
All of the localities are in either the northeastern or the north¬ 
western corner of the state. Various collections of uredinia and 
telia on species of Salix have been referred to this species with 
doubt as they do not seem to be readily separable by their morpho¬ 
logical characters from those of Melampsora bigelowii Thuem. 
Additional Hosts*" 
Not previously recorded as bearing the parasites mentioned in 
Wisconsin. 
Synchytrium aureum Schroet. On Hydrocotyle americana Cary- 
ville. Many leaves bore the parasite at this restricted station but 
the sori were much scattered; only one or very few on a leaf. 
