Wilson: North American Peronosporales 
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Explanation of Plate CXIX 
Fig. i Phytophthora parasitica. Seven stages in oogenesis. After Dastur. 
Fig. 2. Phytophthora Phaseoli. Oospore. After photograph by Clinton. 
Fig. 3. Phytophthora infestans. Resting spore. After Jones, Giddings, 
and Lutman. 
Fig. 4. Phytophthora infestans. Oospore. After photograph by Clinton. 
Fig. 5. Phytophthora Arecae. Oospore. After Coleman. 
