268 



PROCEEDINGS OP THE AMERICAN ACADEMY. 



Plumbaginaceae, 185. 

 Plumbago, 185, 204, 282. 

 Poa, 120. 

 Poinciana, 148. 

 Polygala, 160, 161, 230. 



PoLYGALACEAE, 160, 243. 



Polygon aceae, 134, 243. 

 Polygonum, 134, 227. 

 Polypodium, 106, 110, 111-114, 225, 



251, 261, 262. 

 Polyporus, 83. 

 Polystichum, 106. 

 Porophyllum, 215, 235, 237. 

 Portulaca, 144, 145, 228. 

 Portulacaceae, 145. 

 Potamogeton, 115, 116, 225. 

 Potamogetonaceae, 115. 

 Prosopis, 153, 229. 

 Pseudocyphellaria, 86. 

 Psidium, 182, 232. 

 Psychotria, 185, 207, 234. 

 Pteris, 111, 114, 115, 225. 

 Pycreus, 127. 

 Pyrenula, 84, 86. 



Radula, 101. 



Ramalina, 86, 88. 



Raphanus, 146, 228, 238. 



Rauwolfia, 185. 



Relbunium, 207, 234. 



Rhamnaceae, 171. 



Rhizoclonium, 89, 90. 



Rhizogonum, 261. 



Rhizophora, 182, 194, 232, 237, 247. 



Rhizophoraceae, 182. 



Rhodophyceae, 93. 



Rhodymenia, 99. 



Rhynchosia, 79, 154, 229, 237, 261. 



Riccia, 101. 



Ricinus, 170,231,241/ 



Rinodina, 83, 87. 



Roccella, 87, 88. 



Roccellaria, 87, 88. 



Rolandra, 263. 



Rosaceae, 146, 242. 



Rubia, 207. 



Rubiaceae, 204, 241, 243, 248, 251. 



Ruppia, 116, 225, 237. 



Rushes, 241. 



Rdtaceae, 158. 



Rutilaria, 90. 



m, 



Salvia, 197, 198, 233, 238. 



Salvinia, 115, 225, 237. 



Salviniaceae, 115. 



Sanguisorbea, 146, 228. 



Sapindaceae, 170, 241, 243. 



Sapindus, 171, 231. 



Sarcanthus, 192. 



Sargassum, 92, 93. 



Sarratia, 136. 



Scaevola, 208, 235, 237. 



Scalesia, 216-220, 235, 236, 242-245, 247, 

 249, 251, 254, ^55. 



Scliizophyllum, 83. 



Sehlotheimia, 104. 



Scirpus, 129, 130. 



Scleria, 130, 227, 237. 



Scleropus, 135, 136. 



Sclerothrix, 178, 232. 



Scoparia, 202, 234- 



Scrophulariacea, 202, 284. 



Scrophdlariaceae, 202. 



Scytonema, 89. 



Selaginella, 262. 



Senebiera, 146, 228. 

 Sesuvium, 144, 228, 237. 

 Setaria, 124, 125, 226. 

 Seymour Islands, 250. 

 Sicyos, 208, 235, 237. 

 Sida, 173, 174-176, 231. 

 Simarubaceae, 158, 243. 

 Sinapis, 146. 

 Solanacea, 201. 

 Solanaceae, 198, 241, 243. 

 Solanum, 200, 201, 234. 

 Sonchus, 220, 236. 

 Spatoglossum, 93. 

 Spermacoce, 204-206, 207, 234- 

 Sphaeria, 84. 

 Sphaerococcus, 94, 96, 99. 

 Spilanthes, 220, 236. 

 Spondias, 159. 

 Sporobolus, 125, 226. 

 Stachytarpheta, 196, 233. 

 Stenotaphrum, 126, 226. 

 Sterculiaceae, 176, 243. 

 Sticta, 86, 88. 

 Stipa, 126, 226. 

 Stylosanthes, 79, 154, 229. 

 Surirella, 90. 



Taenitis, 115, 225. 

 Tagetes, 220, 236. 



