INDEX TO THE GENERA. 



203 



Orchis, 9, 60 

 Origanum, 21, 130 

 Ornithogalum, 8, 159 

 Ornithopus, 15, 100 

 Orobanche, 22, 137, 161 

 Osmunda, 4, 32 

 Oxalis, 16, 104 

 Oxyria, 10 

 Oxj'tropis, 15 



Pseonia, 12 

 Panioum, 5, 37 

 Papaver, 13, 78 

 ParentuceUia, 22, 136 

 Parietaria, 10, 64 

 Paris, 8 

 Parnassia, 14 

 Pastinaca, 19, 118 

 Pedicularis, 22, 137, 161 

 Peplis, 17, 111 

 Petasites, 24, 149 

 Petroselinum, 18, 116 

 Peucedanum, 18, 118, 161 

 Phalaris, 5, 37 

 Phegopteris, 4 

 Phleum, 6, 38, 158 

 Phragmites, 6, 41 

 Phyllodoce, 19 

 Physospennum, 18 

 Phyteuma, 23 

 Picris, 25, 154 

 Pilularia, 4, 33 

 Pimpinella, 18, 161 

 Pinguioula, 22, 161 

 Pinus, 4, 34 

 Pirola, 19, 180 

 Pirus, 15, 88 

 Plantago, 22, 138, 161 

 Platanthera, 9 

 Pneumaria, see Mertensia 

 Poa, 6, 43, 158 



Polemonium, 20 

 Polycarpon, 11, 73 

 Polygala, 16, 105, 160 

 Polygonatum, 8 

 Polygonum, 11, 65, 159 

 Polypodium, 3, 30 

 Polypogon, 6, 168 

 Polijstichum, see Aspidium 

 Populus, 9, 61 

 Portulaca, 11, 70 

 Potamogeton, 5, 35 

 Potentilla, 15, 91 

 Poterium, see Sanguisorba 

 Prenaatbes, 25 

 Primula, 19, 119 

 Prunella, see Brunella 

 Prunus, 15, 93, 160 

 Psamma, see Ammophila 

 Pteris, 3, SO 

 Pulicaria, 24, 145 

 Pulmonaria, 20 

 Pijrola, see Pirola 



Q 



Querous, 10, 63 



R 

 Eadiola, 16, 104 

 Ranunculus, 13, 76, 160 

 Reseda, 14, 86 

 Ehamnus, 16 

 Rbapbanus, 13, 83 

 Rbinantbus, 22, 137 

 Rbynchospora, 7 

 Ribes, 14 

 Roemeria, 13 

 Romulea, 8, 59 

 Boripa, see Nasturtium 

 Rosa, 15, 92 

 Rubia, 23, 140 

 Eubus, 15, 89 

 Eumex, 10, 64 



