113 
On Ipomoea commutata , R. and S. W. T. Swingle, No. 4007, June 15, 
1891, Griffin, Spalding County, Ga. Conidia only, on leaves, stems, and 
peduncles. A. B. Langlois, No. 602, August 6, 1885, Pointeala Hache, 
Plaquemine Parish, La. Conidia only, on leaves. 
On Ipomoea hederaeea, Jacq. Erwin F. Smith, July 9, 1890, Talbot 
County, Ga. Conidia only, on leaves. A. B. Lauglois, No. 598, July 27, 
1886, Pointe a la Hache, Plaquemines Parish, La. Conidia only, on 
leaves. 
On Ipomoea incarnata. Vahl. C. S. Sheldon, No. 230, July 28, 1891, 
Quanah. Indian Territory, com., J. M. Holzinger. Conidia only, on 
leaves and stems. Mr. J. M. Holzinger kindly called my attention to 
this new host for the species. Only two plants were sent by Mr. Shel¬ 
don, and both showed the unusually large sori on the stems and on 
nearly all the leaves. 
On Ipomoea leptophylla , Torr. E. Bartholomew, No. 433, July 20,1891, 
Bockport, Rooks County, Kans. Conidia on swollen stems and leaves, 
immature oospores in swollen stems. 
On Ipomoea pandurata, Meyer. S. M. Tracy, July 1,1888, Starkville, 
Oktibbeha County, Miss. Conidia only, on leaves. M. B. Waite, No. 258, 
September 10,1888, Oregon, Ogle County, Ill. Oospores only, in swell¬ 
ings on stems and leaves. The leaves often show a number of spots 5-20 
mm. in diameter that are bulged and corrugated and literally filled with 
nearly mature oospores. Possibly the leaf spots would have shown 
some conidia earlier in the season. E. M. Fisher, No. 201, September, 
1890, Urmeyville, Johnson County, Ind. Conidia and nearly or quite ma¬ 
ture oospores in bullated corrugated spots on the leaf. Much like Waite’s, 
No. 258. 
On Ipomoea lacunosa , L. L. F. Ward, Sept. 7, 1879, Alexandria County, 
Virginia. Conidia only, on leaves. 
On Ipomoea (sp?). S. M. Tracy, September 13,1888, Durant, Holmes 
County, Miss. 
5. Albugo platensis (Spegazzini) Swingle. 
1883. Cy stop us amarantacearum, Zalewski. Zur Kennt. der Gatt. Cystopus L6v. 
Vorlaufige Mittlieilung. <(Bot. Centralb., iv Jahrg. 1883, iii quartal Bd. xv, p. 223, 
pro parte. 
1891. Cystopusplatensis, Spegazzini. Pliycomyceteae Argentinae, No. 15. <Revista 
Argentina de Historia Natural, tomo I, entrega l a , Buenos Aires, Feb. l.°, 1891, p. 32. 
Conidia on upper surface of leaves of Nyctaginaceae. No oospores 
found. 
On Allionia incarnata L. S. M. Tracy, June 18,1887, dry hills, 1 mile 
east of Albuquerque, Bernalillo County, N. Mex. Bilimek ,No. 167, Sept. 
21, 1869, Chapultepek, Mexico, Ex. Herb. Bot. Div. Dept. Agric. From 
Herb. Mus. Paris. 
On Boerhaavia diffusa , (?) L. Newberry in McComb’s expedition, 
sandy river bottoms, 1859, N. Mex., Colo., or Utah. Ex. Herb. Bot. 
Div. Dept. Agric. 
On Boerhaavia erccta , L. Schott, No. 478, June 12,1865, Merida, Yu¬ 
catan, Mexico. Ex. Herb. Div. Bot. Dept. Agric. Edward Palmer, 1885, 
S. W. Chihuahua, Mexico. Ex. Herb. Bot. Div. Dept. Agric. Edw. 
