INDEX 



215 



Oleaceae 106 



Onagra 146 



Onagraceae 144 



Onion, wild 10 



Onosmodium 103 



Opulaster 127 



Opuntia 149 



Orchidaceae 49 



Orchidales 49 



Orchis 50 



Oreocarya 102 



Orobanchaceae 115 



Orobanche 115 



Orophaca 134 



Orthocarpus 114 



Oryzeae 47 



Oryzopsis 45 



Osmorrhiza 160 



Ostrya 157 



Oxalidaceae 81 



Oxalis 81 



Oxybaphiis 70 



Oyster plant 194 



Pachylophus 147 



Panax ,. 158 



Paniceae 39 



Panicularia 30 



Panicum 39 



Fapaveraceae 57 



Papaverales 57 



Papilionaceae 129 



Parietaria 92 



Paronychia 67 



Parosela 138 



Parsnip, wild 162 



Parthenocissus 153 



Paspalum 41 



Fastinaca 162 



Pawpaw, American 57 



Pectis 188 



Pedicularis 105 



Pellitory 92 



Pennyroyal 121 



Fenthorum 142 



Pentstemon 112 



Peppermint 122 



Petalostemon 139 



Phaca 134 



Fhacelia 100 



Phalarideae 38 



Phalaris 38 



Phellopteris 162 



Philotria 48 



Phleum 44 



Phlox 96 



Phragmites 34 



Phryma 116 



Phrymaceae 116 



Physalis 104 



Physaria 62 



Physostegia 120 



Phytolacca 70 



Phytolaccaceae 70 



Picradenia 187 



Picradeniopsis 187 



Pine 5 



Pinoideae 5 



Pinus 5 



Pirola 94 



Pirolaceae 94 



Plantaginaceae 93 



Plantago 93 



Plantain 94 



Plantain, Indian 190 



Platanaceae 143 



Flatanus 143 



Plum, wild 128 



Poa 30 



Foaceae 26 



Poales 17 



Podophyllum 56 



Polanisia 58 



Polemoniaceae 95 



Polemoniales 95 



Polygala 82 



Polygalaceae 82 



Polygonaceae 75 



Folygonatum 12 



Polygonum 77 



Polypogon 44 



I'olypteris 187 



Polytaenia 162 



Pontederiaceae 13 



Populus 68 



Portulaca 70' 



Portulacaceae 69 



I'otamogeton 7 



Potamogetonaceae 7 



Potentilla 124 



Frickly-pear 149 



Frimulaceae 92 



Primulales 92 



Prunella 120 



Prunus 128 



Psoralea 137 



Puccinellia 30 



Pulsatilla 54 



Purslane 70 



