Plants A - B         Plants C - D         Plants E - G         Plants H - K         Plants L - N        
Plants O - P         Plants Q - R         Plants S - T         Plants U - V         Plants W - Z        
List of all plants

Plants O - P

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              Oclemena nemoralis                         Oenothera biennis                            Oenothera laciniata                          Oenothera perennis                       Oenothera speciosa

                 Olsynium douglasii                      Onoclea sensibilis                            Opuntia aureispina                            Optunia fragilis                            Opuntia humifusa

                 Opuntia polyacantha                           Optunia pusilla                              Opuntia stricta                              Orobanche uniflora                          Osmorhiza claytonii

                 Oxalis oregana                                  Oxalis stricta                                Oxalis violacea                          Pachysandra procumbens                     Packera anonyma

                 Packera glabella                     Parthenium integrifolium                   Pedicularis canadensis                       Pedicularis lanceolata                         Penstemon calycosus

                 Penstemon digitalis                       Penstemon fruticosus                       Penstemon gracilis                      Penstemon grandiflorus                   Penstemon hirsutus

              Penstemon laevigatus                       Penstemon pallidus                              Penstemon smallii                         Penstemon strictus                      Penstemon tubaeflorus

                 Penthorum sedoides                  Persicaria amphibia                         Phacelia bipinnatifida                          Phacelia bolanderi                        Phacelia tanacetifolia

                   Phlox bifida                                      Phlox divaricata                                Phlox ovata                                  Phlox pilosa                                    Phlox stolonifera

                        Phlox subulata                          Phryma leptostachya                       Phyla nodiflora                       Physalis virginiana                          Physostegia angustifolia

             Physostegia virginiana                    Phytolacca americana                          Plantago rugelii                       Platanthera ciliaris                      Platanthera clavellata

                 Platanthera flava                      Platanthera integrilabia                        Platanthera lacera                      Platanthera obtusata                           Platanthera psycodes

               Podophyllum peltatum                 Pogonia ophioglossoides                    Polanisia dodecandra                      Polemonium reptans                         Polygala lutea

                    Polygala paucifolia                         Polygala polygama                       Polygala sanguinea                     Polygala verticillata                     Polygonatum biflorum

             Polygonatum pubescens                   Polygonella articulata                 Polygonum pensylvanicum                 Polygonum scandens                    Polygonum virginianum

          Polystichum acrostichoides                Polystichum munitum                         Pontederia cordata                    Porteranthus stipulatus                     Potentilla anserina

                   Potentilla fruticosa                     Potentilla norvegica                             Potentilla palustris                         Potentilla simplex                              Prenanthes alba

                 Prenanthes altissima                    Proboscidea louisianica                      Prunella vulgaris                         Prunella vulgaris alba                           Psoralea tenuiflora

         Pycnanthemum muticum            Pycnanthemum tenuifolium                     Pyrola asarifolia                                Pyrola elliptica                                  Pyrola picta

                Pyrola secunda

Plants A - B         Plants C - D         Plants E - G         Plants H - K         Plants L - N        
Plants O - P         Plants Q - R         Plants S - T         Plants U - V         Plants W - Z        
List of all plants