PLANTS OF IOWA 



245 



Plantaginaceae 217 



Plagiothecium 119 



Placodium 100 



Plasmodiphora 7 



Platygyrium 117 



Platanaceae 176 



Plantago 217 



Platanus 176 



Planosareina 17 



Pieasporeas 32 



Pleomassaria 33 



Pleurocarpus 86 



Pleurococcaceae 89 



Pleurotus 72 



Pleurotaenium 90 



Pleospora 32 



Pleurosigma 85 



Plowrightia 32 



Pluteus 72 



Poa 136 



Podaxineae 76 



Podospora 31 



Podosphsera 29 



Pogonatum 116 



Polypodium 121 



Polemoniacese 206 



Polygonacese 159 



Polystichum 122 



Polytrichum 116 



Polyporus 65 



Polyporaceae 65 



Polytrichese 116 



Polanisia 174 



Polygala 187 



Polemonium 206 



Polystictus 69 



Polymnia 230 



PolygalacesB 187 



Polytremia 200 



Polygonum 160 



Polypodiaceae 121 



Pomaceas 179 



Pontederiaceae 148 



Pontederia 148 



Pophyllum 169 



Populus 154 



Portulacaceae 3 63 



Portulaca 164 



Porphyridium 88 



Poria 68 



Porella Ill 



Potamogeton 126 



Pottieae 114 



Potentilla 177 



Primulaceas 201 



Primula 201 



Prosperpinaca 197 



Protococcus 89 



Protococcaceae 88 



Prunella 



Prunua 180 



Psathyrella 7." 



Pseudomonaa 21 



Psilocybe 7 1 



Psoralea L82 



Ptelea 187 



Pteridophytes Iffl 



Pteridium 12] 



Ptilidium Ill 



Puccinia 



Pulsatilla lf,7 



Pylaisia 117 



Pyronemaceae 39 



Pyrolaceae 200 



Pyrenula 109 



Pyrenomycetes 28 



Py thium 



Pyrola 800 



Pyronema 39 



Pyramidula 115 



Pyxine 98 



Quercus 156 



Ramalina 95 



Eamularia 49 



RanunculaceaB 166 



Eanunculus 168 



Raphanus 171 



Ratibida 231 



Reseda 174 



Resedaceae 174 



Reticularia 12 



Rhamnaceae 191 



Rhamnus 191 



Rhaphidium 87 



Rhexia 196 



Rhizinaceae 39 



Rhizopus 28 



Rhopographus 36 



Rhus 189 



Rhynchostegium 119 



Ribes 175 



Riccia 118 



Ricciaceae 112 



Rinodina 108 



Rivulatiaceae 83 



Robina I s '' 



Roripa 173 



Ro?stelia 



Rosa 178 



Rosacea? l" ,; 



Rosellinia 31 



Rotala IW 



Ru biaceae 817 



Rubua 17,; 



Rudbeckia 



Ruellia - 17 



Rumex 15» 



Rutacece I s " 



