PERONOSPORALES 233 



Wilson, Guy West, Studies in North American Peronosporalcs — I. Tlio 

 genus Albugo. Bui. Torr. Bot. Club, 34 : 61-84, fig. 1-10, 1907o. 



, Studies in North American Peronosporales — II. Phytopiithoreae 



and Rhysotheceae. Bui. Torr. Bot. Club., 34 : 387-416, 19076. 



Studies in North American Peronosporales — III. New or note- 

 worthy species. Bui. Torr. Bot. Club., 35: 361-365, 1908a. 



Studies in North American Peronosporales — IV. Host index. 



Bui. Torr. Bot. Club., 36: 543-554, 19086. 



, Studies in North American Peronosporales — V. A review of the 



genus Phytophthora. Mycologia, S: 54-83, pi. 1 19, l9Ua. 

 -, Studies in North American Peronosporales — VI. Notes on mis- 



cellaneous species. Mijcologia, 6: 192-210, pi. 135, 136, 22 fig., 19146. 

 Wilson, Guy West, Studies in North American Peronosporales— VII. 



New and noteworthy species. Mycologia, 10: 168-169, 1918. 

 Zalewski, a., Zur Kenntniss der Gattung Cystopus Lev. Bot. Centralbl, 



15:215-224,1883. 

 , Ueber Sporenabschniirung und Sporenabfallen bei den Pilzen. 



Flnrn, 66: 228-234, 249-271, 1883. 



