Index to Genera. 



517 



Rivina 457 

 Rondeletia 427 

 Rousselia 466 

 Rudbeckia 177 

 Ruellia 452 



Sabal 471 

 Saccharum 475 

 Sagittaria 240, 472 

 Salix xlviii, Ixviii, 137 

 Salsola Ixvi 

 Salvia 455, 482 

 Sanguinolites 368 

 Sapium 464 

 Sarcophaga 155, 176 

 Sauvagesia 400 

 Savia 461 

 Scatophaga 155 

 Scepsis 176, 178 

 Schmidelia 482 

 Schultesia 442 

 Schwenkia 448 

 Sciadophyllura (427) 

 Scleria 474-5 

 Scolia 175, 177-8 

 Scoparia 449 

 Sebastiania 464 

 Securidaca 401 

 Selaginella 479 

 Senecio 239 

 Seoptera 158 

 Sericosomus 167 

 Serjania 409 

 Sesbania 411 

 Sesia 179 

 Sesuvium 426 

 Setaria 234, 476 

 Sida 401 

 Silphium 176 

 Siphonella 168 

 Siphona 172, 176, 179 

 Siphophyto 179 

 Siphoplagia 176 

 Siratus (380) 

 Sistrum 389 

 Smilax 470 



Solanumlxvi, 239, 447-8 

 Solea 156 

 Solidago 240 

 Sophora 415 

 Sorghum 231, 233 



Sorosporium 229, 234, 240 



Sparganophorus 432 



Sparnopollus 175, 177-8 



Spermacoce 431 



Sphaerodoma 367 



Spbaerophoria 175, 179 



Sphecodes 175, 316-321 



Sphenotus 368 



Spigelia 442 



Spilomyia 176 



Spiraea 165-6, 170 



Spiranthes 468 



Spirifer 363 



Spirifera 367 



Spiriferina 363 



Spirorbis 363 



Spondias 410 



Sporobolus 232, 477 



Stachytarpheta 453 



Stemodia 449 



Stenandrium 452 



Stenostomum 429 



Stenotaphrum 477 



Stigmaphyllon 406 



Stramonita 388 



Straparollus 367 



Strophalosia 363 



Strophomena 367 



Stylogaster 170 



Stylosanthes 163-5, 170, 412 



Suriaoa 407 



Symbathocrinus 367 



Symphoricarpos 172-4 



Symphynota (8, 58) 



Synedrella 434 



Synhalonia 156, 159, 160, 162, 165, 



353 

 Syringotliyris 363, 367 

 Syritta 176, 179 

 Syrphus 153-5, 158, 175, 178 

 Systoechus 177-8 

 Systropus 175 



Tabebuia 450-1, 460 

 Tabernaemontana 440 

 Tamarindus 418 

 Tantilla 501 

 Taonurus 363 

 Taxocrinus 367 

 Taxodium Ixxiv 

 Tecoma (450) 451 



