112 
3. Albugo tragopogonis (Persoon) S. F. Gray, Nat. Arrang. Brit. Plants, vol. I, 
1821, p. 540. 
1801. TJredo ( Albugo ) Candidas Pers. [3. Urcdo Tragopogonis, Persoon. Syn. meth. 
fung. i, p. 223, No. 348. 
1886. Cystopus Tragopogonis (Persoon) Sehroeter. Die Pilze Sclilesiens, Hiilfte i, 
p.234. 
On leaves of Compositte. 
On Helianthus (sp. ?). G. A. Hart, July 12, 1883, Quincy, Adams 
County, Ill. Oonidia and mature oospores in leaves. 0. A. Hart, July 
17,188-,West Quincy, Adams County, Ill. Oonidia and mature oospores 
in leaves. I am inclined to think the host is Iva ciliata , but can not be 
certain. As far as I know A . tragopogonis is unknown on Helianthus , 
although it is abundant in some places on Ira ciliata. 
On Franseria discolor Nutt. (?). S. M. Tracy, September 10, 1887, 
Denver, Arapahoe County, Colo. Oonidia on stems and leaves, oospores 
mature, in leaves. 
On Ambrosia artcmisicefolia , L. A. B. Seymour, August 12, 1885, 
Granville, Hampden County, Mass. Conidia and mature oospores on 
leaves. 
On Ambrosia (sp. ?). S. M. Tracy, June 21,188-, Coolidge, Bernalillo 
County, N. Mex. Conidia only, on leaves. 
On Artemisia biennis , Willd. B. D. Halsted, 1885, Spirit Lake, 
Dickinson County, Iowa. Conidia only, on leaves. 
On Senecio serra , Hook., var. integrius cuius, Gr. F. D. Kelsey, July 9, 
1888, Helena, Lewis and fclarke County, Mont. Conidia and mature 
oospores in leaves. 
On Cnicus horridulus , Pursh. W. T. Swingle, No. 4004, May 22, 1891, 
Norfolk, Norfolk County, Ya. Conidia and mature oospores in leaves. 
On Cnicus lanccolatus , Hoffm. G. W. Clinton, 18—, Buffalo, Erie 
County, N. Y. Conidia only, on leaves. 
On Tragopogon pratensis , L. W. A. Kellenman, No. 10 h , July 15, 
1880, Gottingen, Germany. Conidia only, on leaves. 
On Tragopogon porrifolius , L. G. W. Clinton, 18—, Buffalo, Erie 
County, N. Y. Conidia only, on leaves. 
4. Albugo ipomoeae-panduranae (Sclrvveinitz) Swingle. 
1822. Aecidium Ipomoeae-panduranae, Sell weinitz. Synopsis fung. Carol. No. 454. 
<(Scliriften der naturforsclienden Gesells. zu Leipzig, Bd. i, p. 69. 
1889. Cystopus ipomoeae-panduranae (Scliw.) Stevs. & Swingle. List of Kansas 
species of Peronosporaceae, No. 2. <Trans. 20tk and 21st meetings Kan. Acad. Sci., 
vol. xi, p. 67. 
Conidia on leaves and stems, oospores in stems and petioles of Con- 
volvulacese. 
On Convolvulus f (sp. ?). Conidia only, on leaves. W. T. Swingle, No. 
4005, July 8,1891, Eldorado, Lake County, Fla. Conidia only, on leaves. 
W. T. Swingle, No. 4006, July 13, 1891, Eldorado, Lake County, Fla. 
Conidia only, on leaves. 
On Ipomaia Batatas, Lam. D. G. Fairchild, September 17,1889, Vine- 
land, Cumberland County, N. J. Conidia only, on leaves. 
