PLATE XVI. 



Fig. 1, conidiophore and conidia Bremia lactucae. 



a, conidia; b, oospore. 

 " "2, conidiophore and conidia Peronospora parasitica. 



a, conidia; b, oospore and oogone. 

 " 3, conidiophores and conidia Albugo portulacae. 



a, conidia; b, oospore. 

 " 4, conidiophores and conidia Sclerospora graminicoh 



a, conidia; b, oospore. 

 " 5, conidiophores and conidia Plasmopara halstedii. 



a, conidia; b, oospore. 



