Oldenlandia 74,142 
Olea 92 
Oleandra 138 
Olearia 78 
Oliganthemum 79 
Oligarrhena 107 
Omalanthus 21,141 
Omphacomeria 64 
Onagreae 49 
Oncosporum 7 
Oncostylis 125 
Onychosepalum 124 
Opercularia 75,142 
Ophioderma 136 
Ophioglossum 136 
Ophiorrhiza 74 
Ophiuros 131 
Opilia 63 
Oplismenus 130 
Orchideae 110 
Oreobolus 127 
Oreomyrrhis 63 
Oreostylidium 87 
Orites 68 
Oritina 68 
Ormocarpum 40 
Ornithochilus 111 
Orobanche 98 
Orobancheae 98 
Orthoceras 112 
Orthopogon 130 
Orthostemon 90 
Orthosiphon 100 
Orthotropis 33 
Orthrosanthus 114 
Oryza 132 
Osbeckia 60 
Osbornia 59 
Oschatzia 63 
Osmunda 137 
Osteocarpum 30 
Otanthera 60 
Ottelia 114 
Ourisia 97 
Owenia 9 
Oxalis 13 
Oxleya 9 
Oxycladium 33 
Oxylobium 32 
“Oxymyrrhine 53 
Oxystelma 93 
Ozothamnus 81 
Pachycornia 30 
Pachygone 4 
Pachynema 2,140 
Pachysurus 83 
Pacquerina 77 
Pagetia 12 
Palmae 119 
Palmeria 3 
Panax 61 
Pancovia 24 
Panaetia 80 
Pandaneae 120 
Pandanophyllum 127 
Pandanus 120,140 
Panicum 130 
Panopsis 68 
Papaver 4,141 
Papaveraceae 4 
Pappophorum 133 
Paratropia 61 
Parkeria 137 
Parietaria 22 
Parinarium 47 
Paritium 14 
Parsonsia 93 
Paryphantha 52 
Paspalum 130 
Passiflora 76 
Passifloreae 76 
Patania 137 
Patersonia 114 
Pavetta 74 
Pavonia 14 
Pedalinae 105 
Pedilonum 110 
Pelargonium 13 
Pellaea 138 
Pelonastes 50 
Peltophorum 42 
Pemphis 49 
Pennantia 64 
Pennisetum 131 
Pentaceras 12 
Pentachondra 107 
Pentacraspedion 133 
Pentadactylon 67 
Pentadynamis 38 
Pentagonaster 54 
Pentalepis 83 
Pentapeltis 62 
Pentataphrus 105 
Pentapogon 133 
Pentaptelion 105 
Pentatropis 94 
Peperomia 23,140.141 
Peplidium 97,143 
Pericalymma 54 
Pericampylus 4 
Pernettya 105 
Peroa 105 
Perojoa 105 
Perotis 131 
Persoonia 67,142 
Petalolepis 81 
Petalostigma 19 
Petalostylis 42 
Petermannia 115 
Petrophila 65 
Phacelothrix 82 
Phaenopoda 80 
Phajus 111 
Phalangium 118 
Phaleria 74 
Phanerandra 105 
Pharbitis 94 
Phaseolus 41 
Phebalium 10 
Phegopteris 139 
Pherosphaera 109 
Philotheca 11,140 
Philoxerus 28 
Philydreae 122 
Philydrum 122 
Phlebocalymma 63 
Phlebocarya 115 
Phlebodium 138 
Phoberos 6 
Pholidia 104 
Pholidiopsis 104 
Pholidota 110 
Phormium 117 
Phragmites 135 
Phreatia 110 
Phylachne 87 
Phyllanthus 19,140,141 
Phyllocalymma 82 
Phyllocladus 109 
Phyllodium 40 
Phylloglossum 136 
Phyllopappus 85 
Phylota 36 
Phymatocarpus 56 
Phymatodes 139 
Physalis 95 
Physolobium 41 
Physopsis 103 
Phytolacceae 32 
Picrophyta 88 
Pigea 6 
150 
Pileanthus 52 
Pilitis 108 
Pilularia 136 
Pimelea 73,142 
Piper 23 
Piperaceae 23 
Piptandra 53 
Piptomeris 34 
Piptostemma 82 
Pisonia 32 
Pithecolobium 47 
Pithocarpa 82 
Pithyrodia 103 
Piptocalyx 3 
Pipturus 22 
Pittosporeae 6 
Pittosporum 6,141 
Plagianthus 13 
Plagiogyria 138 
Plagiolobium 38 
Plagiosetum 131 
Plantagineae 91 
Plantago 91,143 
Platycarpidium 62 
Platycerium 139 
Platychilum 38 
Platylobium 37 
Platyloma 138 
Platyptelea 48 
Platysace 62 
Platytheca 9 
Platyzoma 137 
Plectranthus 100 
Pleea 117 
Pleiococea 12 
Pleiogyne 84 
Pleogyne 4 
Pleopeltis 139 
Pleurandra 1 
Pleurandropsis 10 
Pleurocarpaea 77 
Pleurogramme 138 
Pleuropappus 82 
Plexaure 110 
Plinia 59 
Plintacanthus 134 
Plokiostigma 26 
Pluchea 79 
Plumbagineae 26 
Plumbago 26,141 
Poa 134 
Podocarpus 109 
Podocoma 79,142 
Podolepis 80,142 
Podolobium 32 
Podopetalum 42 
Podosperma 80,140,142 
Podostemoneae 23 
Podotheca 80, 140,142 
Poecilodermis 15 
Pogonia 104,111 
Pogonolepis 82 
Pogonolobus 75 
Pogonatherum 131 
Pogonetes 87 
Pogostemon 100 
Poiretia 38,108 
Polanisia 4 
Pollia 122 
Pollichia 100,143 
Pollinia 131 
Polyalthia 3,140 
Polycalymma 82 
Polycarpaea 27 
Polycarpon 27 
Polyenemon 29 
Polygala 8,141 
Polygaleae 8 
Polygonaceae 31 
Polygonum 31,142 
Polymeria 95, 143 
Polyosma 48 
Polyphragmon 75 
Polypodium 139 
Polypogon 131 
Polypompholyx 98 
Polystichum 138 
Polyzone 51 
Pomaderris 60,142 
Pomatotheca 31 
Pomax 76 
Ponceletia 108 
Pongamia 42 
Pontederiaceae 121 
Popowia 3 
Porana 95 
Poranthera 18,141 
Porospermum 61 
Portulaca 27,141 
Portulaceae 27 
Posidonia 121 
Potamogeton 121 
Potamophila 132 
Potentilla 47 
Pothos 120 
Pouzolzia 22,141 
Pozoa 63 
Pozoopsis 63 
Prasophyllum 112,140,145 
Pratia 85 
Premna 103 
Primulaceae 91 
Prionosepalum 124 
Prionotes 108 
Pritzelia 62,122 
Procris 22 
Pronaya 7 
Prostanthera 101,140 
Proteaceae 65 
Prunella 101 
Pseudalangium 74 
Pseudanthus 18,141 
Pseudatalaya 24 
Pseudomorus 22 
Pseudopholidia 104 
Psilotrichum 28 
Psilotum 136 
Psoralea 38,142 
Psychotria 75 
Psydrax 75 
Pterigeron 79,142 
Pteris 138 
Pterocaulon 79 
Pterochaete 80 
Pterolobium 42 
Pteroloma 40 
Pterostigma 97 
Pterostylis 113 
Pterygopappus 80 
Ptilotus 28,140, 141 
Ptychosema 39 
Ptychosperma 120 
Pultenaea 36 
Pumilio 82 
Punicella 54 
Pyenolachne 102 
Pyenosorus 83 
Pycnospora 40 
Pycreus 124 
Pygmaea 97 
Pyxidaria 143 
Quinetia 82 
Quintinia 48 
Quoya 103 
Ramphidia 111 
Randia 74 
Ranunculaceae 1 
Ranunculus 1,141 
Raoulia SO 
Rapuntium 85 
