INDEX TO KEY OF FAMILIES AND GENERA 



145 



Pterig, 135. 

 Pterocactus, 101. 

 Pterocarpus, 95. 

 Pterocarya, 118. 

 Pteroeeltis, 118. 

 Pterolobium, 95. 

 Pteronia, 107. 

 Pterospermum, 90. 

 Pterostylis, 123. 

 Pterostyrax, 109. 

 Ptychoccocus, 131. 

 Ptychoraphis, 131. 

 PtJ'chosperma, 130. 

 Pueraria, 94. 

 Puimonaria, 111. 

 Pultensea, 94. 

 Puuic-a, 99. 



PUNICACE.E, 82, 99. 



Purshia, 97. 

 Puschkiiiia, 128. 

 Putranjiva, 118. 

 Puya, 126. 



Pjcnauthemum, 116. 

 Pycuostachys, 116. 

 Pyracantha, 96. 

 PjTenacantha. 85. 

 PjTethrum, 107. 

 Pyrola, 108. 

 PYROL.1CE.E, S3, 108. 

 Pyrostegia, 113. 

 Pyrularia, 117. 

 PiTus, 97. 

 Pyxidanthera, 109. 



Quamoclit, 111. 

 Quassia, 91. 

 Quekettia, 123. 

 Quercus, 119. 

 Quesnelia, 126. 

 Quillaja, 96. 

 Quisqualis, 98. 



Rademiachia, 113. 

 Radicula, 88. 

 Rajania, 123. 

 Ramonda, 114. 

 Randia, 103. 

 Ranevea, 131. 

 Ranuncclace^, 80, 86. 

 Ranunculus, 86. 

 Raphanus, 87. 

 Raphiolepis, 97. 

 Raphionacme, 110. 

 Rathbunia, 101. 

 Rauwolfia, 110. 

 Ravenala, 125. 

 Ravenia, 91. 

 Reevesia, 90. 

 Rehmannia, 113. 

 Reineckia, 127. 

 Rcinwardtia, 90. 

 Rfnanthera, 123. 

 Renealmia, 125. 

 Reseda, 88. 

 Resedace^, 80, 88. 

 restiace.e, 85. 

 Restio, 85. 

 Restrepia, 122. 

 Reynosia, 92. 

 Rhabdothamnus, 114. 



RHAM.NACE.E, 81, 92. 



Rhamnella, 92. 

 Rhamnus, 92. 

 Rhaphidophora, 131. 

 Rhajjidophyllum, 129. 

 Rliapis 129. 



10 



Rheedia, 89. 

 Rheum, 117. 

 Rhexia, 99. 

 Rhipidopteris, 135. 

 Rhipsalis, 100. 

 Rhizophora, 98. 



RH1ZOPHORACE.E, 82, 98. 



Rhodochiton, 112. 

 Rhododendron, 108. 

 Rhodoleia, 98. 

 Rhodomyrtus, 99. 

 Rhodorhiza, 111. 

 Rhodothamus, 108. 

 Rhodotypus, 97. 

 Rhoeo, 129. 

 Rhopaloblaste, 130. 

 Rhopalostylis, 130. 

 Rhus, 93. 



Rhynehanthus, 125. 

 Rhynchosia, 95. 

 Rhynchospora, 133. 

 Rhynchostylis, 123. 

 Ribes, 97. 



Ricinodendron, 119. 

 Ricinus, 118. 

 Rigidella, 124. 

 Rivina, 116. 

 Robinia, 95. 

 Rochea, 98. 

 Rodgersia, 98. 

 Rodriguezia, 123. 

 Rcettlera, 114. 

 Rohdea, 127. 

 Rollinia, 86. 

 Romneya, 87. 

 Romulea, 124. 

 Rondeletia, 103. 

 Rosa, 97. 

 R08ACE.E, 82, 96. 

 Roscheria, 130. 

 Roscoea, 125. 

 Rosmarinus, 115. 

 Rothrockia, 110. 

 Rottboellia, 134. 

 Roupala, 117. 

 Royena, 109. 

 Roystonea, 130. 

 Rubia, 103. 

 RUBIACE.E, 82, 102. 

 Rubus, 97. 

 Rudbeckia, 106. 

 RueUia, 114. 

 Rulingia, 90. 

 Rumex, 117. 

 Rungia, 114. 

 Rupieola, 108. 

 Ruscus, 126. 

 Russelia, 112. 

 Ruta, 91. 

 RUTACE^, 81, 90. 



Sabal, 129. 

 Sabbatia, 110. 

 Sabiace.*:, 81, 92. 

 Saceharum, 133. 

 Saccolabiura, 123. 

 Sagina, 89. 

 Sagittaria, 132. 

 Saintpaulia, 114. 

 SALICACE.E, 84, 119. 

 Salicomia, 116. 

 Salix, 119. 

 Salpichroa, 112. 

 Salpiglossis, 112. 

 Salpinga, 89. 

 Salsola, 116. 



Salvia, 115. 

 Salvinia, 136. 

 SALVINIACE.E, 85, 136. 

 Sambucus, 102. 

 Sanchezia, 114. 

 Sandersonia, 128. 

 Sanguinaria, 87. 

 Sanguisorba, 97. 

 Sanicula, 101. 

 Sansevieria, 127. 

 SantalacE/E, 84, 117. 

 Santalum, 117. 

 Santolina, 106. 

 Sanvitalia, 106. 

 Sapindace^, 81, 92. 

 Sapindus, 92. 

 Sapium, 119. 

 Saponaria, 89. 

 SAPOTACE.E, 83, 109. 

 Saraca, 95. 

 Sarcanthus, 123. 

 Sarcoeephalus, 103. 

 Sarcochilus, 123. 

 Sarcococca, 119. 

 Sarcodes, 108. 

 Sarcopodium, 123. 

 Sargentodoxa, 87. 

 Sarracenia, 87. 

 Sarraceniace.e, 80, 87. 

 Sassafras, 117. 

 Satureia, 116. 

 Satyrium, 123. 

 Sauromatum, 131. 

 Sauropus, 118. 

 Saururace«, 84, 117. 

 Saururus, 117. 

 Saussurea, 107. 

 Saxifraga, 98. 

 SaxifragacejE, 82, 97. 

 Scabiosa, 103. 

 Scaevola, 85. 

 Scandix, 101. 

 Scaphosepalum. 122. 

 Scaphyglottis, 123. 

 Schaueria, 114. 

 Scheelea, 129. 

 Scheeria, 113. 

 Schefflera, 102. 

 Schima, 89. 

 Schinus, 92. 

 Schismatoglottis. 131. 

 Schizaea, 135. 

 SCHIZ.EACE.E, 85, 135. 

 Schizandra, 86. 

 Schizanthus, 112. 

 Schizoeodon, 109. 

 Schizolobiura, 95. 

 Schizopetalon, 88. 

 Schizophragnia, 97. 

 Schizostylis, 124. 

 Schlimmia, 123. 

 Schlumbergera, 100. 

 Schomburgkia, 122. 

 Schotia, 95. 

 Schrankia, 94. 

 Sciadopitys, 120. 

 SeUla, 128. 

 Scindapsus, 131. 

 Scirpus, 133. 

 Sclcrocarpus, 106. 

 Scol^Tiius, 107. 

 Scopolia, 112. 

 Seorpiurus, 95. 

 Seorzoiiera, 107. 

 Scrophularia, 112. 



SCROl'HOLARIACE^, 83, 112. 



Scutellaria, 115. 

 Scuticaria, 123. 

 Scyphanthus, 100. 

 Sebastiana, 119. 

 Secale, 134. 

 Sechium, 100. 

 Securinega, 118. 

 Sedum, 98. 



SELAGINACE.E, 114. 



Selaginella, 134. 

 Selaginellace^, 85, 134. 

 Selenia, 88. 

 Selenicereus, 101. 

 Selinum. 101. 

 Semecarpus, 92. 

 Semele, 126. 

 Sempervivum, 98. 

 Senebiera, 87. 

 Seneeio, 107. 

 Sequoia, 120. 

 Serapias, 121. 

 Serensea, 129. 

 Sericocarpus, 105. 

 Serissa, 103. 

 Serjania, 92. 

 Serratula, 105. 

 Sesamum, 114. 

 Sesbania, 95. 

 Seseli, 101, 

 Sesuvium, 101. 

 Setaria, 133. 

 Severinia, 91. 

 Seymeria, 113. 

 Shepherdia, 117. 

 Shortia, 109. 

 Sibbaldia, 97. 

 Sibirsea, 96. 

 Sibthorpia, 113. 

 Sicana, 100. 

 Sicyos, 100. 

 Sida, 90. 

 Sidalcea, 89. 

 Sideritis, 116. 

 Sideroxylon, 109. 

 Sievekingia, 123. 

 Signiatostalix, 123. 

 Silene, 89. 

 Silphium, 106. 

 Simarubace.e, 81, 91. 

 Simmondsia, 119. 

 Sinningia, 113. 

 Sinofranchetia, 87. 

 Sinomenium, 86. 

 Sinowilsonia, 98. 

 Siphocampylus, 107. 

 Sisyrinchium, 124. 

 Sium, 101. 

 Skinimia, 91. 

 Smelowskia, 88. 

 Smilacina, 127. 

 Smilax, 126. 

 Smodingium, 93. 

 Sobolewskia, 87. 

 Sobralia, 122. 

 Solanaceje, S3, 112. 

 Solandra, 112. 

 Solanum, 112. 

 Soldanella, 109. 

 Solea, 88. 

 Solenanthus, 111. 

 Solenidium, 123. 

 Soiidago, 105. 

 Sollya, 88. 

 Sonchus, 107. 

 Sonerila, 99. 

 Sophora, 94. 



