INDEX TO THE ILLUSTRATIONS. 



573 



Nemaliou multifidum, 375 

 Nepenthes arapullaria, 483 

 Nitella flexilis, 331 

 Nostoc, 87, 217 

 Nuphar advena, 30 



Oat, 454 



Ochrolecliia pallescens, 299 



ffidogonium, 33, 247 



(Eiiogonium ciliatum, 348 



CEdogonium gemelliparuin, 248 



Onion, 76 



Orchis mascula, 469 



Oscillatoria, 37, 317 



Osmunda, 377 



Palm (stem), 443 



Pandorina Morum, 223 



Papaver Rhoeas, 555 



Parmelia aipolia, 296 



Parmelia tiliacea, 302 



Peach (flower), 530 



Pediastrum granulatum, 65, 224 



Penicillium chartarum, 285 



Peronospora, 361 



Peronospora Alsinearum, 48, 261 



Peronospora calotheca, 358 



Peronospora infestans, 358 



Pertusaria ceuthocarpa, 399 



Pertusaria Wulfeni, 309 



Peziza confluens, 386 



Peziza convesula, 42, 287 



Peziza omphalodes, 387 



Phaseolus multiiJoras, 43, 475 



Phoenix dactylifera, 453 



Phragmidiuni bulbosum, 315 



Phragmidium mucronatum, 315 



Physarum leucopus, 308 



Pilularia globulifera, 380 



Pinus Larico, 401 



Pinus pinaster, 73, 134 



Pinus Pinea, 405 



Pinus sylvestris, 35, 36, 394, 395, 



398 

 Piptocepha]is Freseniana, 239 

 Pirus communis, 528 

 Pirus Cydonia, 528 

 Pisum sativum, 54 

 Plagiochilia asplenioideg, 349 

 Polypodium, 378 

 Polypodium vulgare, 108 

 Potamog:eton pectinatus, 129 

 Potato (flower), 501 

 Primula sinensis, 97 

 Prunus Cerasus, 530 



Psoralea bituminosa, 122, 476 

 Pteris aquilina, 24, 37, 72, 81, 83, 



107, 871, 372,373 

 Puccinia fframinis, 311, 313 

 Puccinia Moliniae, 314 



Quince, 538 



Quercus Robur, 449, 478 



Ranunoultjs rbpens, 119 



Rhizomorplia subcorticalis, 66 



Rlvubarb, GO 



Riccia glauca, 345, 846 



Rice, 455 



Ricinus communis, 117, 118, 474 



Rosa canina, 427 



Rosa rubiginosa, 439 



Rye, 96 



Sacchakomtcks ceretisi^, 39, 



214 

 Salix caprsea, 486 

 Salvinia natans, 380, 881 

 Sambucus ni^ra, 445, 446 

 Saprolegnia, 255 

 Saprolegnia androaryna, 257 

 Sarracenia purpurea, 557 

 Schizaia, 377 

 Scorzonera hispanica, 75 

 Scrophularia, 499 

 Sedum purpurascens, 101 

 Selaginella caulescens, 384 

 Selaginella insequifolia. 111, 886 

 Selaginella Martensii, 384, 385 

 Sequoia gig-antea, 80 

 Shepherd's Purse, 558 

 Silphium laciniatum, 157 

 Solanum, 501 



Sorisporium Saponariae, 320 

 Sphaeria morbosa, 293 

 Spliserophorus globiferus, 398, 302 

 Sphaeroplea annulina, 245 

 Sphaerotheca Castagnei, 280 

 Sphaerotheca pannosa, 280 

 Sphagnum acutifolium, 355 

 Spliagnum squarrosum, 355 

 Spirillum volutans, 213 

 Spirochaete plicatilis, 213 

 Spirogyra longata, 45, 46, 51, 233 

 Stachys angustifolius, 441 

 Sticta fuliginosa, 295 

 Sticta pulmonacea, 30S 

 Stipa spartea, 158 

 Sunflower, 68 



