INDEX 



419 



Prasiola crispa (176) 

 Preissia quadrata 344 

 Psathyrella atomaria 44 



disseminata 44 

 Pseudoleskea atrovirens 292, 306 



radicosa 292 



rigescens (292) 



stenophylla 292, 306 

 Pseudopeziza bistort* 23 



cerastiorum arenarise 23 

 Pseudovalsa ribesia 29, 60, pi. v, f. 14 

 Psilocybe polytrichi 44 

 Psilopilum arcticum 287 

 Pteridium aquilinum pubescens 379 



lanuginosum (379) 

 Pteridopkytes 4, 8, 9, 373 

 Pteris aquilina (379) 



aquilina lanuginosa (379) 



argentea (379) 



lanuginosa (379) 

 Pterygophyllum lucens 291, 306 

 Ptilidium californicum 343, 363 



ciliare 363 

 Ptilota asplenoides 159, 203 



plumosa 159, 203 



serrata 160, 203 

 Puccinia asteris 39 



bullata 38 



caricis 37, 40 



circaese 38 



fergussoni 39 



gentian ae 37 



geranii silvatici 37, 39 



heucherae 39 



laurentiana 38 



molinise 37 



porphyrogenita 39 



prenanthis 39 



procera 39 



saxifragse 39 



saxifragae-ciliatae 38 



thlaspeos 39 



tiarellae 39 



uliginosa 40 



valeriange 39 

 Punctaria plantaginea 158, 184 



plantaginea linearis 184 

 Pycnothalia cladinoides 147 

 Pylaiella littoralis 158, 196 



Pylaiella littoralis acuta 182 

 densa 183 

 macrocarpa 183 

 opposita 182 

 varia 183 



Pyrenophora chrysospora 28 

 connata 28 

 phaeospora 28 

 polyphragmia 28 



polyphragmoides 28, 60, pi. v, f . 13 

 Pyrenula 78 



gemmata 70 

 Pythium gracile 35 



Radula arctica (366) 



bolanderi 343, 366 



complanata 366 



krausei (366) 

 Ralfsia clavata 158, 188 



deusta 158, 180, 188 

 Ramalina 3 



calicaris farinosa 147 



cuspidata 147 



geniculata ( 147) 



minuscula 147 



polymorpha 146 

 emplecta 146 



pusilla geniculata 147 

 Ramularia sequivoca 17 



anserina 16 



arnicalis 17 



cercosporoides 16 



heraclei 17 



macrospora 17 



pratensis 17 



punctiformis 16, 56, pi. in, f. 8 

 Raphidostegiumpseudorecurvans(30i) 



subdemissum 296 

 Red snow 173 

 Reindeer 7 

 Remedies 5 

 Rhabdonema arcuata 207 



biquadratum 207 



elegans 207 



fauriae 207 



japonica 207 



striatula 207 



Rhabdospora camptospora 18, 62, pi. 

 vi, f. 26 



