362 



INDEX. 



Sabbatia, 247 

 Sagina, 129 "* 



Sagittaria, 9 

 Salicaceae, 98 

 Salicales, 98 

 Salix, 99 

 , Salomonia, 86 

 Salsola, 121 

 Salvia, 269 

 Sambucus, 293 

 Samolus, 243 

 Sangfuinaria, 145 

 Sanguisorba, 172 

 Sanicula, 228 

 Santalaceae, 112 

 Santalales, 11 1 

 Sapindaceae, 206 

 Sapindales, 201 

 Saponaria, 127 

 Sarothra, 213 

 Sarracenia, 157 

 Sarraceniaceae, 157 

 Sarraceniales, 157 

 Sassafras, 143 

 Satureia, 270 

 Saururaceae, 98 

 Saururus, 98 

 Saxifragaceae, 160 

 Saxifraga, 160 

 Scandix, 22p 

 Scheuchzeriaceae, 9 

 Scheuchzeria, 9 

 Scirpus, 45 

 Scleranthaceae, 121 

 Scleranthus, 121 

 Scleria, 51 



Scrophulariaceae, 277 

 Scrophularia, 279 

 Scutellaria, 265 

 Sedum, 159 

 Senecio, 339 

 Sericocarpus, 318 

 Sesbati, 185 

 Sherardia, 292 

 Sibbaldiopsis, 168 

 Sicyos, 299 

 Sida, 209 

 Silene, 126 

 Silphium, 329 

 Simarubaceae, 196 

 Sinapis, 151 

 Sisymbrium, 150 

 Sisyrinchium, 89 

 Sium, 231 

 Smilax, 87 

 Smilacaceae, 87 

 Solanaceae, 274 

 Solatium, 275 

 Solidago, 315 

 Sonchus, 303 

 Sophia, 156 

 Sorbaria, 165 

 Sorbus, 173 

 Sorghastrum, i5 

 Sorghum, 16 

 Sparganiaceae, 4 

 Sparganium, 4 



Spartina, 31 

 Spathyema, 73 

 Specularia, 300 

 Spergula, 130 

 Spermolepis, 233 

 Spiraea, 164 

 Spirodela, 74 

 Sporobolus, 26 

 Stachys, 268 

 Staphyleaceae, 205 

 Staphylea, 205 

 Steironema, 244 

 Stenanthium, 81 

 Stenophragma, 151 

 Stenophyllus, 50 

 Stipa, 24 

 Streptopus, 85 

 Strophostyles, 190 

 Stylosanthes, 186 

 Stylophorum, 145 

 Symphoricarpos, 295 

 Symphytum, 261 

 Syndesmon, 138 

 Synosma, 339 

 Syntherisma, 17 

 Syringa, 245 



Taenidia, 231 

 Talinum, 124 

 Tanacetum, 337 

 Taraxacum, 303 

 Taxaceae, 4 

 Taxus, 4 

 Tecoma, 287 

 Teucrium, 264 

 Thalesia, 286 

 Thalictrum, 142 

 Thaspium, 232 

 Thlaspi, 149 

 Thuja, 3 



Thymeleaceae, 219 

 Thymeleales, 219 

 Thymus, 271 

 Tiarella, 160 

 Tilia, 208 

 Tiliaceae, 208 

 Tillaea, 159 

 Tipularia, 98 

 Tissa, 130 

 Torilis, 229 

 Toxylon, no 

 Tradescantia, 75 

 Tragopogon, 303 

 Trautvetteria, 139 

 Triadenum, 213 

 Trichostema, 264 

 Tridens, 32 

 Trientalis, 244 

 Trifolium, 183 

 Triglochin, 9 

 Trilliaceae, 86 

 Trillium, 87 

 Triosteum, 294 

 Triphora, 96 

 Triplasis, 32 

 Tripsacum, 15 

 Trisetum, 30 



TroUius, 135 

 Tsuga, 3 

 Tuli^a, 83 

 Tussilago, 338 

 Typhaceae, 4 

 Typha, 4 



Ulex, 182 

 Ulmaceae, iii 

 Ulmaria, 171 

 Ulmus, III 

 Umbellales, 225 

 Umbelliferae, 226 

 Unifolium, 85 

 Uniola, 34 

 Urticaceae, 109 

 Urticales, 108 

 Urtica, 109 

 Urticastrum, 109 

 Utricularia, 285 

 Uvularia, 86 



Vaccaria, 127 

 Vacciniaceae, 240 

 Vaccinium, 241 

 Vagnera, 85 

 Valeriana, 297 

 Valerianaceae, 297 

 Valerianales, 297 

 Valeriauella, 297 

 Vallisneria, ii 

 Veratrum, 81 

 Verbascum, 278 

 Verbenaceae, 261 

 Verbena, 261 

 Verbesina, 333 

 Vernonia, 311 

 Veronica, 281 

 Viburnum, 293 

 Vicia, 190 

 Vinca, 24^ 

 Vincetoxicum, 252 

 Violaceae, 215 

 Viola, 215 

 Vitaceae, 207 

 Vitis, 207 



Waldsteinia, 170 

 Washingtonia, 229 

 Willugbaeya, 314 

 Wolffia, 73 



Xanthium, 307 

 Xanthorrhiza, 135 

 Xanthoxylum, 195 

 Xolisma, 240 

 Xyridaceae, 74 

 Xyridales, 74 

 Xyris, 74 



Yucca, 84 



Zannichellia, 5 

 Zannichelliaceae, 5 

 Zizania, 23 

 Zizia, 230 



