Witson : NortTH AMERICAN PERONOSPORALES 405 
Helianthus doronicoides Lam., Iowa, Arthur; Kansas, 
Kellerman (Fungi Europ. 3278, N. Am. Fungi 7403 c). 
Flelianthus grosseserratus Martens, lowa, fitchcock, Mac- 
bride ; Nebraska, Sheldon. 
Flelianthus jirsutus Raf., Missouri, Pammel. 
Helianthus Maximilianit Schrad., lowa, * Pammel. 
Helianthus occidentalis Riddell, Wisconsin, Pammed. 
FHlelianthus scaberrimus Ell., Nebraska, Bates (Fungi 
Columb, 2739). 
Helianthus strumosus 1., Minnesota, Arthur ; Wisconsin, 
Davis. 
Helianthus tuberosus L., Pennsylvania, E//is (N. Am. Fungi 
1403 a); Wisconsin, Farlow, Pammed. 
Flelianthus sp., New York, Thom; Missouri, Galloway 
(on “Vernonia noveboracensis”); Wisconsin, Davis. 
Rudbeckia laciniata L., Nebraska, Sheldon ; North Dakota, 
Seymour ; Wisconsin, Davis, Pammel. 
Rudbeckia triloba L., Mlinois, Hart. 
Silphium integrifolium Michx., Kansas, Kellerman ( Fungi 
Europ. 3279) ; Nebraska, Sheldon; Wisconsin, Davis, 
Pammel. 
Silphium laciniatum L., lowa, Arthur. : 
Siphium perfoliatum L., lowa, Bessey ; Minnesota, Pam- 
mel; Missouri, Pammel ; Nebraska, Sheldon ; Wiscon- 
sin, Davis, Tracy. 
Silphium terebinthinaceum Jacq., Ulinois, Pammel ; Wiscon- 
sin, Davis, Pammel, Trelease (N. Am. Fungi 7403 6). 
Verbesina encelioides (Cav.) A. Gray, New Mexico, F. S. & 
. S. Harle 172. 
The iiowise additional hosts are reported from our limits : 
Artemisia ludoviciana Nutt., Bidens comosa (A. Gra y) Wiegand, 
B. connata Muhl., Centaurea sp., Helianthus trachaelifolius Willd., 
lva xanthiifolia (Fres.) Nutt., Madia sativa Molina, Siphium tri- 
Soliatum LL, , Solidago canadensis L., S. Riddellit Frank, Vernonia 
Baldwinii ee V. noveboracensis (L.) Michx., and Xanthium 
canadensis Mill. Of these two are somewhat doubtful, as it is 
quite probable that the record of /va as a host refers to Basidio- 
a Kellermanii, while a part of the material which served as the 
