lU 



INDEX TO KEY OF FAMILIES AND GENERA 



Osmuoda. 135. 

 OsMrNDACE^, 85, 135. 

 Osteomeles. 90. 

 Osteospermum, 107. 

 Ostrowskia, lOS. 

 Ostrya, 119. 

 Othoiina, 107. 

 Ouratea, 91. 

 Ourisia, 113. 

 Ox.\LIDACEi:, SI, 90. 

 Oxalis. 90. 

 Oxera, 115. 

 Oxyanthus, 103. 

 Oxydendrum, 108. 

 Oxylobium, 94. 

 Oxypetalum, 110. 

 Oxypolis, 101. 

 Oxyteuanthera, 134. 

 Oxytropis, 95. 



Pachira. 90. 

 Pachycereus, 101. 

 Pach,\-ph>-tum, 98. 

 Parhypodium. 111. 

 Pachyrhizus, 94. 

 Pachysandra, 119. 

 Pachystima, 92. 

 Pachystroma, 119. 

 Paederia, 103. 

 Pseonia, 86. 

 Palava, 89. 

 Palisota. 128. 

 Paliurus, 92. 

 Palmace.e, 85, 129. 

 Palmereiia, 107. 

 Palumbina, 123. 

 Pamburus, 91. 

 Panax, 101. 

 Pancratium, 125. 

 Pandanace.e, 85, 131. 

 Pandanus, 131. 

 Pandorea, 113. 

 Panicum, 133. 

 Panisea, 123. 

 Papaver, 87. 



PAPAVERACE.E, 80, 87. 



Papeda. 91. 

 Paphinia, 123. 

 Paphiopedilum, 121. 

 Paradisea, 127. 

 Paramignya, 91. 

 Parietaria, 118. 

 Paris, 128. 

 Parkin-sonia, 95. 

 Parmentiera, 113. 

 Pamas.sia, 97. 

 Parochetus, 95. 

 Paronychia, 89. 

 PaiTotia, 98. 

 Panya, 88. 

 Parwjnsia, 111. 

 Parthenium, 106. 

 Parthenoeis.sus, 92. 

 Pascalia, 106. 

 Paspalum, 1.34. 

 Pas.siflora, 100. 



PAS-mFLORACE-E, 82, 100 



Pastinaoa, 101. 

 Patrinia, 103. 

 Paullinia. 92. 

 Paulownia, 112. 

 Pavetta, 103. 

 Pavonia, 89. 

 Pectinaria, 110. 



PEDALIACE.E, 83, 114. 



Pedicularis, 113. 



Podilanthu.s, 119. 

 Pelargonium, 90. 

 P^■lee^^)h()ra, 100. 

 Pi-liosantlies, 128. 

 P.-lla>a, 135. 

 Pdlionia, 118. 

 Peltandra, 131. 

 Pcltaria, S7. 

 Poltopliorum, 95. 

 Penuisetum, 133. 

 Pentacha'ta, 105. 

 Pentapetes, 90. 

 Pentapterygium, 108. 

 Pentas, 103. 

 Pentsteraon, 112. 

 Peperomia, 117. 

 Peponia, 100. 

 Peraphyllum, 97. 

 Pereskia, 100. 

 Pereskiopsis, 100. 

 Pericome, 106. 

 Perilla. 116. 

 Periploca, 110. 

 Peristeria, 123. 

 Peristrophe, 114. 

 Pernettya, 108. 

 Perowskia, 115. 

 Persea, 117. 

 Pertya, 107. 

 Peseatorea, 123. 

 Petalostemon, 95. 

 Petasites, 107. 

 Petiveria, 116. 

 Petraea, 114. 

 Petrophytum, 96. 

 Petroselinum, 101. 

 Petteria, 94. 

 Petunia, 112. 

 Peucedanum, 101. 

 Peumus, 117. 

 Pfaffia, 116. 

 Phacelia, 111. 

 Phaedranassa, 125. 

 Phaedranthus, 113. 

 Phajus, 122. 

 Phalsenopsis, 123. 

 Phalaris, 134. 

 Phalocallis, 124. 

 Phaseolus. 94. 

 Phegopteris, 136. 

 Phellodendron, 91. 

 Philadelphus, 97. 

 Philesia, 126. 

 Philibertia, 110. 

 Phillyrea, 109. 

 Philodendron, 131. 

 Phlebodium, 135. 

 Phleum, 1.34. 

 Phlogacanthus, 114. 

 Phloinis, 116. 

 Phlox, 111. 

 Phccnix, 129. 

 Pholidota, 122. 

 Phoradendron, 117. 

 Phormium, 127. 

 Photinia, 96. 

 Phragmites, 134. 

 Phragmopedilum, 121. 

 I'hryma, 114. 

 Phrymace.«, 83, 114. 

 Phrynium, 125. 

 Phygi;liu.s, 112. 

 Phyllagathis, 99. 

 Phyllanthua, 118. 

 Phyllitis, 136. 

 Phyllocladus, 120. 



PhyUodocc. 108. 

 Phyllostachys, 134. 

 PhjTnatodes, 135. 

 Physalis, 112. 

 Physaria, 88. 

 Physiantlms, 110. 

 Physoean>us, 96. 

 Physoptychis, 88. 

 Physosiphon, 123. 

 Physostegia, 115. 

 Physurua, 122. 

 Phytelephas, 131. 

 Phyteuma, 108. 

 Phytolacca, 116. 



PHYTOLACCACE.E, 84, 116. 



Piaranthus, 110. 

 Pieea, 120. 

 Picrasma, 91. 

 Pieris, 108. 

 Pigafetta, 131. 

 Pilea, 118. 

 Pilocarpus, 91. 

 Pimelea, 117. 

 Pimenta, 99. 

 PiNACE.E, 84, 120. 

 Pinanga, 130. 

 Pinckneya, 103. 

 Pinellia, 131. 

 Pinguicula, 113. 

 Pinus, 120. 

 Piper. 117. 

 P1PERACE.E, 84, 117. 

 Piptadenia, 94. 

 Piptanthus, 95. 

 Pipturus, 118. 

 Piqueria, 105. 

 Piscidia, 94. 

 Pisoiiia, 116. 

 Pistacia, 92. 

 Pistia, 131. 

 Pisum, 94. 

 Pitcairnia, 126. 

 Pithecoctenium, 113. 

 Pithecolobium, 93. 

 P1TTO.SPORACE.E, 81, 88. 

 Pittosporum, 88. 

 Placea, 124. 

 Plagianthus, 90. 

 Plagiobothrys, 111. 

 Plagiospermum, 97. 

 Planera, 118. 

 PlantaoinacevE, 83, 116. 

 Plantago, 116. 



PLATANACE.E, 84, 118. 



Platanus, 118. 

 Platouia, 89. 

 Platyearya, 118. 

 Platycerium, 135. 

 Platyclinis, 122. 

 Platycodon, 107. 

 Platycrater, 97. 

 Platylepis, 123. 

 Platystemon, 87. 

 Platystigma, 87. 

 Platytheca, 88. 

 Plectocomia, 129. 

 Plectranthus, 115. 

 Plectronia, 103. 

 Pleione, 122. 

 PleiocariJa, 111. 

 Pleiospermum, 91. 

 Pleurothallis, 122. 

 Plocama, 103. 

 Plukenetia, 119. 



PLnMBAOINACE.E, 83, 109. 



Plumbago, 109. 



Plumeria, 110. 

 Poa, 134. 



Podachaenium, 106. 

 Podalyria, 95. 

 Podocarpus. 120. 

 Podolepis, 105. 

 Podophyllum, 87. 

 Podostigma, 110. 

 Pogonia, 122. 

 Pogostemon, 116. 

 Poinciana, 95. 

 Poivrea, 98. 

 Polanisia, 88. 



POLEMONIACE.E, 83, 111. 



Polemonium, 111. 

 Polianthes, 125. 

 Poliothyrsis, 88. 

 Pollia, 128. 

 Polycycnis, 123. 

 Polygala, 88. 



POLYGALACE.E, 81, 88. 

 POLYGONACE«, 84, 116. 



Polygonatum, 127. 

 Polygonum, 117. 

 Polymnia, 106. 

 POLYPODIACE.E. 85, 135. 

 Poljijodium, 135. 

 PoliTsteris, 106. 

 Polyrrhiza, 123. 

 Polyscias, 102. 

 Polystachya, 122. 

 Polystichum, 136. 

 Pomaderri.s, 92. 

 Poncirus, 91. 

 Pontederia, 128. 



PoNTEDERIACE,E, 85, 128. 



Ponthieva, 122. 

 Populus, 119. 

 Porana, 111. 

 Poranthera, 118. 

 Portenschlagia, 101. 

 Portulaca, 89. 



POKTnLACACE.E, 81, 89. 



Posoqueria, 103. 

 Potamogeton, 132. 

 Potentilla, 97. 

 Poterium, 97. 

 Pothos, 131. 

 Pouteria, 109. 

 Premna, 115. 

 Prenanthes, 107. 

 Prestonia, 110. 

 Primula, 109. 



PRIMULACACE.E, 83, 109. 



Prinsepia, 97. 

 Prionium, 129. 

 Pritchardia, 129. 

 Prochnyanthes, 125. 

 Promenaea, 123. 

 Prosopis, 94. 

 Prostanthera, 115. 

 Protea, 117. 



PROTEACE.E, 84, 117. 



Prunus, 97. 



Pseuderanthemum, 114. 

 Pseudolarix, 120. 

 Pseudopanax, 102. 

 Pseudophcenix. 131. 

 Pseudotsuga, 120. 

 Psidium, 98. 

 Psilostrophe, 107. 

 Psoralea, 95. 

 Psychotria, 103. 

 Ptaeroxylon, 91. 

 Ptelea, 91. 

 Pteridium, 135. 



