Witson: NortH AMERICAN PERONOSPORALES 71 
Ipomoea pandurata L., Alabama, Carver; Delaware, Com- 
mons ; Florida, Hume 79, Nash 1889, Tracy 7155; 
Georgia, Underwood; Mllinois, Hart; Indiana, Arthur, 
Olive; Missouri, Kellerman, Galloway, Tracy & Galloway; 
New Jersey, * Halsted 164 (Econ. Fungi 377, also conidia 
as 336), Stevens; Ontario, * Dearness; Virginia, Paul 
(Fungi Columb. 2004). 
Ipomoea Pes-caprae L., Bahamas, Hitchcock ; Porto Rico, Hel- 
ler 13906. 
Ipomoea simulans Hanbury, Morelos, Pringle 6565. 
Ipomoea triloba L., Arizona, LeRoy, Pringle. 
Pharbitis hederacea (L.) Choisy, District of Columbia, Wil- 
liams ; Georgia, Underwood ; Illinois, Seymour ; Indiana, 
Olive, Underwood; Kansas, Bartholomew (Fungi Columb. 
2002); Kentucky, Kellerman ; Louisiana, Langlois 589; 
Missouri, Galloway, Pammel ; Nebraska, Wiliams ; New 
Jersey, Halsted (Econ. Fungi 3344, 334¢) Stevens ; South 
Carolina, Ravenel (Fungi Am. 507), Kolfs 1686 ; Virginia, 
Seymour (Econ. Fungi 3342). 
Pharbitis purpurea (L.) Voigt, Georgia, Underwood ; Missis- 
sippi, Zracy. 
Thyella tamnifolia (L.) Raf., Cuba, Britton & Shafer 679. 
The following additional hosts are reported within our limits : 
Convolvulus sepium L., Ipomoea incarnata Vahl, 7. Jalapa Michx., 
and Quamoclit Quamoclit (.) Britton. 
Type Locatity : North Carolina, on /pomoea “ pandurana te 
Disrrisution : Ontario to California, Central America and the 
West Indies. Also in South America, Europe, Asia and Africa. 
5. Arsuco Lericoni (de Bary) Kuntze, Rev. 
Gen. Pl, 2: 658. 18901 
Erysibe sphaerica 8 Caryophyllacearum Wallr. Fl. Crypt. Germ. 
2: 193. 1833. 
Cystopus Lepigoni de Bary, in Rabenh. Fungi Europ. 483. 1863. 
Cystopus argentinus Speg. Bol. Acad. Ci. Cordoba 11: 28. 1887. 
Caulicolous or epiphyllous ; sori rounded or elongate, I 
yellowish ; conidiopbeves clavate ; conidia with the membrane of 
Uniform thickness throughout, of two kinds, the terminal larger, 
hyaline or light-yellow, globular, 25-39 the membrane about 5 # 
