Witson : NortH AMERICAN PERONOSPORALES 67 
Nesha paniculata Desv., Quebec, Eggleston 2978. 
Raphanus sativus L., linois, Breyfogle ; Indiana, Underwood ; 
Iowa, Arthur; Kansas, *Bartholomew (Fungi Columb. 
1805); New York, Arthur, * Underwood. 
Roripa Armoracia (L.) A. S. Hitchcock, Indiana, Stewart, 
* Wilson ; Kansas, Bartholomew (Fungi Columb. 7806), 
Kellerman ; Massachussetts, Seymour (Econ. Fungi 4540); 
Missouri, Demetrio (N. Am. Fungi 2420) ; New Jersey, 
Stevens ; New York, Arthur, Holzworth, Underwood ; Ohio, 
Kelsey (Econ, Fungi 4542); South Dakota, Williams. 
Roripa hispida (Desv.) Britton, Illinois, Arthur. 
Roripa obtusa (Nutt.) Britton, Kansas, Bartholomew (Fungi 
Columb. 2709). 
Roripa palustris (DC.) Bessey, Oregon, Cusick 2600. 
Roripa sessilifiora (Nutt.) A. S. Hitchcock, Illinois, Patterson ; 
Iowa, Ehinger; Kansas, Bartholomew (Fungi Columb. 
2001); Kentucky, Price ; Tennessee, Ruth 747. 
Roripa Walteri (Ell.) Greene, Florida, Underwood ; Texas, 
Bush 25, Lighthipe. 
Schoenocrambe linifolium (Nutt.) Greene, British Columbia, 
? Macoun. 
Sisymbrium officinale (L). Scop., Indiana, Arthur, Olive, Under- 
wood, Wilson; Massachusetts, Farlow (N. Am. F ungi : 
2046) ; Missouri, Bartholomew (Fungi Columb. 2777) ; New 
Jersey, Halsted (Ec. Fungi 259a); New York, Underwood 
270a,; Nova Scotia, Robinson 463a ; Ontario, Dearness 
(Econ. Fungi 2594); Pennsylvania, Britton ; Washington, 
Parker, Piper ; Wisconsin, Pammed. 
Sophia Hartwegiana (Tourn.) Greene, Montana, Azderson, 
Kelsey. 
Sophia incisa (Engelm.) Greene, Colorado, Baker, Earle & 
Tracy 1084 ; Montana, Kelsey. 
Sophia millefolia Rydb., Indiana, Underwood. 
Sophia pinnata (Walt.) Britton, Arizona, * Grifiths (W. Am. 
Fungi 335); Indiana, Underwood (Ind. Fl. 984); Durango, 
Palmer. 
Thlaspi glaucum A, Nelson, Wyoming, Nelson 4177- 
Thlaspi Nuttallii Rydb., Montana, Blankinship. 
