INDEX TO THE ILLUSTRATIONS. 



573 



Netnalion multifidum, 275 

 Nepenthes ampullaria, 483 

 Nitella flexilis, 331 

 Nostoc, 37, 317 

 Xuphar ad vena, 20 



Oat, 454 



Ochrolecllia pallescens, 399 



(Edogonium, 23, 247 



CEdogonium ciliatum, 248 



CEdogonium gemelliparuin, 348 



Onion, 76 



Orchis mascula, 469 



Oscillatoria, 37, 317 



Osmunda, 377 



Palm (stem), 448 



Pandorina Morum, 232 



Papaver Rhoeaa, 555 



Parmelia aipolia, 296 



Parmelia tiliacea, 803 



Peach (flower), 530 



Pediastrum granulatum, 60, 334 



Peuicillium chartarum, 385 



Peronospora, 361 



Peronospora Alsinearum, 48, 261 



Peronospora calotlieca, 3o8 



Peronospora infestans, 25S 



Pertusaria ceuthocarpn, 299 



Pertusaria WulCeni, 309 



Peziza confluens, 386 



Peziza couvexula, 42, 287 



Peziza omphalodes, 287 



Phaseolus multiflorua. 43, 47.1 



Phoenix dactylifera, 413 



Phragmidium bulbosum, 815 



Phragmidium niucronatum, 815 



Physarum leucopus, 208 



Pilularia globulifera, 380 



Pinus Larico, 401 



Pinus pinaster, 72, 124 



Pinus Pinea, 405 



Pinus sylvestria, 35, 26, 394, 393, 



398 

 Piptocephalis Freseniana, 289 

 Pirus communis, 538 

 Plrus Cydonia, 528 

 Pisum sativum, 54 

 Plagiochilia asplenioides, 349 

 Polypodium, 373 

 Polypodium vulgare, 108 

 Potamogeton pectinatus, 129 

 Potato (flower), 501 

 Primula sinensis, 97 

 Pmnus Cerasus, 530 



Psoralea bituminosa, 123, 476 

 Pteris aquilina, 24, 27, 72, 81, 83, 



107, 371, 872, 873 

 Puccinia graminis, 311, 313 

 Puccinia Molinise, 814 



Quince, 528 



Quercus Robur, 449, 478 



Ranunculus bbpbns, 119 



Rhizomorplia subcorticalis, 66 



Rhubarb, 00 



Riccia glauca, 345, 346 



Rice, 455 



Ricinus communis, 117, 118, 474 



Rosa canina, 437 



Rosa rubiginosa, 429 



Rye, 96 



Saccharomtcks cbrbtislsi, 39, 



314 

 Salix eapraea, 486 

 Salvinia natans, 380, 381 

 Sambucus nigra, 445, 446 

 Saprolegnia, 355 

 Saprolegnia androgyua, 257 

 Sarracenia purpurea, 557 

 Schizsea, 377 

 Scorzouera hispanica, 75 

 Scrophularia, 499 

 Sedum purpurascens, 101 

 SelagineDa caulescens, 884 

 Selaginella insequifolia. 111, 386 

 Selaginella Martensii, 384, 385 

 Sequoia gigantea, 80 

 Shepherd's Purse, 553 

 Silphium laciniatum, 157 

 Solanum, 501 



Sorisporium Saponariae, 320 

 Sphasria morbosa, 293 

 Spliaerophorus globiferus, 298, 303 

 Sphseroplea annulina, 345 

 Sphserotheca Castagnei, 280 

 Sphaarotheca pannoaa, 280 

 Sphagnum acutifolium, 355 

 Sphagnum squarrosum, 355 

 Spirillum volutans, 213 

 Spirochaete plicatilis, 213 

 Spirogyra longata, 45, 46, 51, 233 

 Stachys angustifolius, 441 

 Sticta fuliginosa, 295 

 Sticta pulmonacea, 308 

 Stipa spartea, 158 

 Sunflower, 68 



