26 THE WEST VIRGINIA FLORA 



SPORODINIA Link. 

 S. Aspergillus (Scop.) Schroet. 



On dead Agaricus and Boletus, Sept. lo, 1893 {Nuttall, 

 1 196). 



PERONOSPORACEAE. 



CYSTOPUS Lev. 

 C. CANDiDUS (Pers.) Lev. 



On living leaves of Dentaria diphylla, Monongalia Co., 

 at Little Falls (Millspaugh). On Brassica nigra, July 8, 

 1893 {Nuttall, 1082). On Sisymbrium officinale; Raphanus 

 sativus and Lepidium Virginicum {Sheldon, 686, i.577> 3020, 

 3291; 1792, 3035; 4457). 

 C. Ipomoeae-Panduratae (Schw.) Stev. & Sw. 



On Ipomoea pandurata {Sheldon, 701, 706, 784, 919, 1956, 

 3159, 3246). 

 C. Tragopogonis (Pers.) Schroet. 



On Senecio aureus and Ambrosia arteniisiaefolia {Sheldon, 

 2960, 3080). 

 C. Portulacae (DC) Lev. 



On Portulacca oleracea, July 8, 1893 {Nuttall, 1083). 

 C. Bliti (Biv.) DeB. 



On Amaranthus retroflexus, July 20, 1893. Spores 18 to 

 22 X 15 to 18 IX {Nuttall, 1615). 



PLASMOPARA Schroet. 

 P. viTicoLA (B. & C.) Berl. & De Ton. 



On fruit of Vitis Labrusca, Monongalia Co., near ]\Iorgan- 

 town {Millspaugh). 

 P. CuBENSis (B. & C.) Humphrey. 



On cucumbers, Mason, near Elwell, and on I\Iusk Melons, 

 Ohio, near Elm Grove {Sheldon, 1018, 2009, 2097). 

 P. OBDUCENS Schroet. 



On Impatiens sp. (Sheldon, 2297). 

 P. Geranii (Pk.) Berl. & DeToni. 



On Geranium maculattim {Sheldon, 651, 2967). 

 P. RiBicoLA Schroet. 



On Ribes sp. (Wild gooseberry) {Sheldon, 2446). 

 P. Halstedii (Farlow) Berl. 



On Ambrosia trifida {Sheldon, 2957). 



PHYTOPHTHORA DeBary. 

 P. infestans (Mont.) DeB. 



On living leaves and tubers Solanutn tuberosum, ^lonon- 

 galia Co., near Morgantown {Millspaugh). 



