MINNESOTA BOTANICAL STUDIES. 



rufescens (Neck.) Hoffm. . 



Pelvetia fastigiata (J. Ag.) De 



Toni 23 



Pertusaria 



communis DC 



183, 213, 230, 



leioplaca (Ach.) Schaer. . . 



multipuncta (Turn.) Nyl. . 



-ophthalniza Ntl 



pustulafca (Ach.) Nyl 



velata (Turn.) Nyl 



Petalonema alatum 



Peucedanum nudicaule Nutt 



Phalaris arundinacea L 88, 



canariensis L. 



Pharomitrium subsessile Sch 



Phascum 



Phegopteris calcarea Fee 



dryopteris (L. ) Fee 



hexagonoptera ( Michx. ) Fee 



phegopteris ( L. ) Underw . . 



polypodioides Fee 



robertiana (Hoff. ..) A. Br. 



Philonotis 



alpicola Jur 113, 



Phleum pratense L 



Phragmiies communis Trin 



phragmites (L.) Karst.... 



Phyllophora membranifolia 



Phyllospadix 150, 152, 



seouleri 147, 149, 



Phyllospora menzieii 



Physalacria 320, 323, 



inflata (S.) Peck. .323, 324, 



langloisii E. & E 



orinocencis Pat 



Physalis virginiana intermedia 



Rydb 



Physcia aquila (Ach.) Nyl 



aquila (Ach.) Nyl. var. 



detonsa Tuck 



astroidea ( Fr. ) Nyl 



caesia (Hoffm.) Nyl... 174, 



ciliaris (L.) DC 



hispida (Ach.) Tuck 



hispida (Fr.) Tuck.... 177, 



hispida ( Schreb. ) Fr 



hispida (Schreb.) Tuck... 



hispida ( Schreb., Fr. ) Tuck. 



obscura (Ehrh.) Nyl. . . . 



177, 187, 



obscura (Ehrh.) Nyl. var. 



endochrysea Nyl. ..176, 



pulverulenta (Schreb.) Nyl 



pulverulenta (Schreb.) 



Nyl. var. leucoleiptes 

 Tuck 



speoiosa (Ach.) Nyl 



speciosa (Wulf.,Ach. ) Nyl. 



stellaris (L.) Tuck 



177, 186, 187, 



stellaris (L.) Tuck. var. 



apWa Nyl 174, 



tribacia (Ach.) Tuck 



Physcomitrium hookeri Hampe... 



— turbinatum C. M 



Pimpinella integerrima Gray 



Pinus 



contorta 



insignis 



monticola 



ponderosa 



sabiniana 



Pistilliaria 323, 324, 



Pistillina paradoxa B. & C 



stillboidea Cooke 



stillboidea (Cke.) Sacc... 



203 



-45 

 184 



234 



213 

 213 

 213 

 213 

 212 

 47 

 243 

 260 

 88 

 114 

 113 

 252 

 252 

 251 

 251 

 251 

 252 

 112 

 118 

 91 

 97 

 97 

 293 

 154 

 152 

 1 

 327 

 326 

 326 

 326 



267 

 198 



198 

 199 

 199 

 174 

 181 

 187 

 170 

 174 

 199 



199 



200 

 198 



198 

 177 

 198 



19S 



199 

 199 

 117 

 117 

 241 

 271 

 272 

 271 

 272 

 271 

 271 

 326 

 327 

 327 

 327 



Placodium 187 



aurantiacum (Light.) Naeg. 



and Hepp 175, 207 



cerinum (Hedw. ) Naeg. 



and Hepp 175, 187, 207 



cerinum (Hedw.) Naeg. and 



Hepp. var. pyracea Nyl. 207 



cerinum ( Hedw. ) Naeg. 



and Hepp. var. sideritis 



Tuck 207 



cinnabarium (Ach.) Anz. . . 



175, 207 



citrinum (Hoffm.) Leight. 



175, 207 



elegans (Link.) DC... 174, 206 



ferrugineum (Huds.) Hepp. 208 



ferrugineum (Huds.) Hepp. 



var. pollinii Tuck 208 



murorum (Hoffm.) DC... 207 



vitellinum (Ehrh.) Naeg. 



and Hepp 175, 208 



vitellinum (Ehrh.) Naeg. 



and Hepp. var. aurellum 



Ach 208 



Plagiochila asplenioides (L. ) Du- 



mort 142 



Plagiothecium sullivantise Sch .113, 123 

 Platygyrium repens (Brid. ) B. S. 122 



Pleuridium subulatum B. S 113 



Poa alpina L 101 



alsodes A. Gray 100 



annua L 99 



caesia J. E. Smith 100 



caesia stridor A. Gray. ... 99 



compressa L 101, 261 



debilis Torr 100 



fiava L 99, 100, 261 



glauca Vahl 100 



nemoralis L 99 



palustris L 100 



pratensis L 100 



pseudopratensis Scribn. & 



Rydb 100 



serotina Ehrb 100 



sylvestris A. Gray 100 



wolfii Scribn 100, 259, 261 



Polygonaceas 264 



Polygonum aviculare L 264 



lapathifolium D 264 



persicaria L 264 



Polypodiacese 250, 260 



Polypodium vulgare L 250 



Polyporus 213, 224, 223 



Polysiphonia 148, 152, 154 



Poly st i chum acrostichoides 



(Michx.) Schott 253 



lonchitis (L.) Roth 253 



Polytamia nuttalli DC 242 



Polytrichum commune D 120 



junipernum Willd 120 



piliferum Schreb 120 



Pomrruaceas 265 



Populus 225, 231, 233, 236 



Porella pla.typh.ylla (L. ) Lindb. . . 144 



rivularis (Nees) Trevts... 144 



Porphyra 294, 29 6 



Postelsia palmiformis 157, 163 



Postelsise 157 



Prunus pennsylvanica L 265 



pumila L 265 



Psoralea agrophylla Pursh...258, 265 

 Pteridium aquilinum (L. ) Kuhn. 250 



Pteridophyta 245, 260 



Pteris aquiline, L 250 



Pterygoneurum subsessile (Brid.) 



Jur 113, 114 



Pterygophora 160, 161, 162, 163 



