375 



Pace. 



Sisymbrium, 1 68 



Sisymbrium, .... 167, 169, 170, 173 



Sisyrinchium 119 



Sitilias, 349 



Slum, 243 



Sium, '. . . . 239, 245 



Smilace^, 116 



Smilacifia, 114 



Smilax, 116 



Smyrniut/i, 240, 242, 243 



SOLANACE.E, 287 



Solanum, 288 



Solaiium, 287 



Solea, 228 



Solidago, 317 



Solidago 315, 321, 324 



Sonchus, 351 



Sonchus, 349 



Sophora, 193 



Sorbus, 182 



Sorghum, 28, 352 



Sparganiace^, 19 



Sparganium, • . . ^9 



Spargaiiophorus, 31 1 



Spartina, 45 



Spartium, 194 



Spathyema loi 



Specularia, 309 



Spergula, 152 



Spergula, 15 1 



Spergularia, • ^52 



Spermacoce 303 



Spermolepis, 244 



Sphseralcea, 222 



Spiesia, 201, 357 



Spigelia, 258 



Spilanthes, 335 



Spiraea, 181 



Spiraa, 177, 182, 189, 357 



Spiranthes, 123, 124 



Spirodela, 102 



Sporobolus, 38, 353 



Stachys, 285 



Stachys, 283, 286 



Stanleya 166 



Staphylea 218 



Staphyleace^, 218 



Statice, 256 



Statice, 255 



Steironema, 254 



Stellaria, 149, 150, 152, 356 



Stenactis 328 



Stenanthium, no 



Stenophragma, , 173 



Stenophyllus, 65 



Stenosiphon, 236 



Stenotus, 317 



Stevia, 338 



Stewartia, 224 



Stillingia, 213 



Page. 



Stipa 35 



Stipa, 36 



Stccpelina, 313 



Streptopus, 115,354 



Strophostyles, 208 



Stylipis, 188 



Stylisma, 267 



Stylophorum, 164 



Stylosanthes, 202 



Stylosanthes, . . . . • 196 



Styrace.^ 256 



Styrax, 257 



Su?eda, 144 



Subularia, 167 



Sullivantia, 178 



Swertia, 259, 261 



Symphoricarpos, 305 



Symphytum, 276 



Symplocace^, 256 



Symplocarpus, 10 1 



Symplocos, 256 



Synandra, 285 



Syndesmon, . . . . 158 



Syntkerisma, . . 31, 32 



Synt/iyris, 294 



Syringa 257 



Taberncemontana, 262 



Tagetes, 339 



Talinum, 147, 356 



Tanacetum, 341, 359 



Taraxacum, 349 



Taxodium, 18 



Taxus, 19 



Tecoma, 299 



Tephrosia, 197 



Tetragonanthus, 261 



Tetragonotheca, 334 



Tetranthera, 164 



Teucrium 286 



Thalesia, 298 



Thalia, 120 



Thalictrum, 161 



Thalictrtim, 1 58 



Thapsia, 240 



Thaspium, 240 



Thaspium, 243 



Theace^, 224 



Thelesperma, 336 



Thelypodium, 167 



7 he ly podium, 169 



Ther7nia, 193 



Thermopsis, 193 



Therofon, 177 



Thesium, . 1 36 



Thlaspi, 167 



Thlaspi, 172 



Thuja 19 



Thymeleace/E, 230 



Thymus, , 280 



