INDEX 



325 



Olpidium, pendulum, 73 



uredinis, 73 



viciae, 45, 75 



zijgneviicolum, 73 

 Oljridiopsis, 66, 67, 73 



aphanomycis, 67 



luxurians, 67 



minor, 67 



saprolegniac, 67 



vexans, 67, 68 

 Oi7MdiM?n-like thalli, 63, 120 

 Ooch>'triaceae, 105 

 Oogonial branch, 152 

 Oogonium, 29, 186 



basal type of, 203 

 Ooraycetes, characterized, 32, 40 

 Oomycetous, 32 

 Ooplasm, 31 

 Oosphere, 30, 153, 186 



compound, 31, 191 

 Oosporangium, 44 

 Oospore, 30, 32, 44, 153, 186 

 Ordinal names, endings of, 39 

 Oscarbrefeldia pcllucida, 307, 311 

 Ostenfeldiella, 66 



diplantherar, 66 



Papidaspora, 303 

 Paragynous, 203 

 Paraphyses, 294 

 Parasitella, 251 

 Parasites, 2 



facultative, 186 



obligate, 186, 281 

 Parthenogenesis, 36, 123, 147, 154 

 Parthenospores, 131 

 Pedicel cell, 207 

 Perfect stage, defined, 14 

 Perforated septa, 135 

 Pericystis alvei, 311, 312 

 Peridium, in Myxomycetes, 9 

 Periplasm, in antheridium, 32 



in oogonium, 31, 186 

 Perithecium, 16, 302 

 Peronoplasviopara, 211, 218 



canabina, 219 



celtidis, 218 



Peronopla^^mopara, cubensis, 218 



humidi, 219 



portoricensis, 219 

 Peronospora, 212, 221 



cadorum, 206 



celtidis, 218 



cubensis, 218 



cffusa, 221 



fagi, 206 



parasitica, 222 



sempervivum, 206 



spinaciae, 221 

 Peronosporaceae, 186, 210, 211 

 Peronosporales, 40, 185 

 Phaeophyceae, 2 

 Phlyctidium, 90, 98 



brevipes, 97, 98 

 Phlyctochytrium, 89, 94 



equate, 94 



planicorne, 94 

 Phycocyanin, 3 

 Phycomyccs, 243, 248 



blakesleeanus, 249 



microsporus, 249 



?»7e?i.s, 237, 238, 249 



pirottianus, 249 



spimdosus, 249 



splendens, 249 

 Phycomycetes, 2, 15, 21 



origin of, 21 

 Phyllobium., 13, 110 

 Phylogeny, 37, 47, 54 

 Physiological research on Saproleg- 



niales, 146 

 Physoderma, 101, 103 



butomi, 103 



heleocharidis, 106 



maculare, 103, 106 



menyanthis, 106 



vagans, 106 



zeae-maydis, 104, 106 

 Pkysorhizophidium, 98 

 Phytomyxa, 49 



leguminosarum, 49 



lupini, 49 

 Phytomyxinae, 49 

 Phytomyxini, 49 

 PMjtophthorn, 194, 199 



agaves, 206 



