INDEX 



Rydbergia , F, 117 

 Rydbergiella, F, 57 

 Rye, G, 8 

 Ryegrass, G, 8 



Sabina, T&S, 3 

 Sacaton, G, 10 

 Saf flower, F, 107 

 Sage, T&S and F, 92 

 Sagebrush, T&S, 104 

 SAGINA, F, 33 

 SAGITTARIA, F, 4 

 Sainfoin, F, 62 

 SALAZARIA, T&S, 92 

 SALICACEAE, T&S, 20 

 SALICORNIA, F, 29 

 SALDC, T&S, 20 

 Salsify, F, 124 

 SALSOLA, F, 30 

 Salt-- 



bush, T&S, 28 



grass, G, 5 



wort, F, 78 

 SALVIA, F and T&S, 92 

 SALVINIA, F, 2 

 SALVINIACEAE, F, 2 

 SAMBUCUS, T&S, 101 

 SAMOLUS, F, 79 

 Samphire, F, 29 

 Sandalwood Family, F, 22 

 Sand-- 



bur, F, 11 



paper plant, F, 69 



spurry, F, 34 



verbena, F, 30 



wort, F, 32 

 SANGUISORBA, F, 52 

 Sanicle, F, 77 

 SANICULA, F, 77 

 SANTALACEAE, F, 22 

 Sapium, F, 65 

 SAPONARIA, F, 34, 35 

 Saracha , F, 93 

 SARCOBATUS, T&S, 30 

 SARCODES, F, 78 

 SARCOSTEMMA, F, 81 

 Satintail, G, 12 

 SAURURACEAE, F, 20 

 Savastana, G, 11 

 SAXIFRAGA, F, 48 

 SAXIFRAGACEAE, F, 46 

 Saxifrage, F, 48 

 Scalybroom, T&S, 118 

 SCHEDONNARDUS, G, 11 

 SCHEUCHZERIA, F, 4 

 SCHEUCHZERIACEAE, F, 4 

 SCHISMUS, G, 9 

 Schizachyrium, G, 12 

 Schmaltzia , T&S, 65 

 Schoenocrambe, F, 45 

 SCHOENUS, GL, 15 

 SCIRPUS, GL, 14, 15 

 Scleroc actus , T&S, 69 

 SCLEROCHLOA, G, 7 

 SCLEROPOGON, G, 7 

 SCOLOCHLOA, G, 7 

 SCOPULOPHILA, G, 34 

 Scorzonella, F. 119 

 Scouringrush, F, 2 

 Scratchgrass, G, 10 

 SCROPHULARIA, F, 99 

 SCROPHULARIACEAE, F, 93 

 Scurfpea, F, 62 

 SCUTELLARIA, F, 93 

 Sea-- 



milkwort, F, 78 



purslane, F, 31 

 SECALE, G, 8 



Sedge, GL, 12 

 SEDUM, F, 46 

 Seedbox, F, 70 

 Seepweed, F, 30 

 Sego Lily, F, 17 

 SELAGINELLA, F, 2 

 SELAGINELLACEAE, F, 2 

 Selfheal, F, 92 

 SELINOCARPUS, F, 31 

 Selinum, F, 77 

 SENECIO, F, 120, 122 

 Senna, T&S, 52 

 Serapias, F, 19 

 Sericotheca , T&S, 50 

 Serviceberry, T&S, 49 

 SESUVIUM, F, 31 

 SETARIA, G, 12 

 Shadscale, T&S, 28 

 Sheep Sorrel, F, 27 

 SHEPHERDIA, T&S, 70 

 Shepherds Purse, F, 40 

 Shinleaf, F, 77 

 Shooting Star, F, 78 

 SIBARA, F, 44 

 SIBBALDIA, F, 52 

 SIDA, F, 66 

 SIDALCEA, F, 67 

 Sideranthus 



australe, F, 116 



gooddingii, F, 115 



gracilis, F, 115 



grindelioides, F, 119 



puberulus, F. 116 



turbinellus, F, 116 

 Sieversia , T&S, 49 

 SILENE, F, 34 

 Silktassel, T&S, 77 

 Silverbush, F. 64 

 SILYBUM, F, 122 

 Simsia , T&S, 111 

 Sinapis , F. 40 

 Siphonella , F, 84 

 SISYMBRIUM, F, 39-45 

 SISYRINCHIUM, F, 18 

 SITANION, G, 7, 8 

 SIUM, F, 74, 77 

 Skeletonplant , F, 118 

 Skeletonweed, F, 118 

 Skullcap, F, 92 

 Sloughgrass, G, 11 

 Smartweed, F, 26 

 SMELOWSKIA, F, 44, 45 

 SMILACINA, F, 17, 18 

 Snakeweed, T&S, 115 

 Snapdragon, F, 93 

 Sneezeweed, F, 116 

 Snowberry, T&S, 101 

 Snow Plant, F, 78 

 Soapwort, F, 34, 35 

 SOLANACEAE, F, 93 

 SOLANUM, F, 93 

 SOLIDAGO, F, 116, 120, 122 

 Solomon Plume, F, 17 

 Solomonseal, F, 17 

 SONCHUS, F, 123 

 Sonnea , F, 91 

 Sophia, F, 40 

 SOPHORA, T&S, 62 

 SORBUS, T&S, 52 

 SORGHASTRUM, G, 12 

 Sorghum, G, 12 

 Sorrel, F, 26, 27 

 Sowthistle, F, 123 

 SPARGANIACEAE, GL, 3 

 SPARGANIUM, GL, 3 

 SPARTINA, G, 11 

 Spatularia, F, 48 

 Spectaclepod, F, 41 



Specularia , F. 102 

 Speedwell, F. 99 

 SPERGULA, F, 34 

 SPERGULARIA, F, 34 

 SPERMATOPHYTA, T&S, 2 

 SPHAERALCEA, F, 66, 67 

 Sphaeromeria, F, 123 

 Sphaerophysa, F, 63 

 Sphaerostigma, F, 71, 72 

 SPHENOPHOLIS, G, 9 

 SPHENOSCIADIUM, F. 77 

 Sphondylium, F, 75 

 Spiderling, F, 31 

 Spiderwort, F, 15 

 Spike Fescue. G, 6 

 Spikemoss, F, 2 

 Spikeprimrose, F, 70 

 Spikerush, GL. 14 

 SPIRAEA, T&S, 49, 50, 52 

 SPIRANTHES, F, 19 

 SPIRODELA, F, 15 

 Spleenwort, F, 1 

 Sprangletop, G. 11 

 SPOROBOLUS, G, 10 

 AIROIDES, G, 10 



WRIGHTII, G, 10 

 aristulata. G. 10 

 ASPER, G, 10 

 asperifolia. G. 10 

 CONTRACTUS, G, 10 

 CRYPTANDRUS, G, 10 

 filiformis , G, 10 

 FLEXUOSUS, G, 10 

 GIGANTEUS, G, 10 

 INTERRUPTUS, G, 10 

 jonesii, G, 10 

 microspermus, G. 10 

 minutissima, G, 10 

 NEALLEYI, G, 10 

 NEGLECTUS, G, 10 

 PULVINATUS, G, 10 

 ramulosus, G, 10 

 strictus , G. 10 

 TEXANUS, G, 10 

 thurberi , G. 10 

 tricholepis, G, 9 

 utilis, G, 10 

 wolfii, G, 10 

 wrightii, G, 10 

 SPRAGUEA, F, 32 

 Spring Beauty, F, 31 

 Spruce, T&S, 2 

 Spurge, F, 64 

 Spurry, F, 34 

 Squawapple, T&S, 50 

 Squirreltail, G, 8 

 STACHYS, F, 93 

 Staff -tree Family, T&S, 65 

 STANLEYA, F, 45 

 STANLEYELLA, F, 45 

 Starlily, F. 17 

 Star of Bethlehem, F, 17 

 Starwort, F, 34 

 Stegnocarpus, F, 88 

 STEIRONEMA, F, 79 

 STELLARIA, F, 34 

 Stenophyllus , GL, 12 

 Stenotopsis , T&S, 116 

 Stenotus 



acaulis, F, 115 



kennedyi, F, 115 

 armerioides, F, 115 

 caespitosa, F, 115 

 falcatus , F. 115 

 interior, T&S, 116 

 latifolius , F, 115 

 linearifolius , T&S, 116 

 interior, T&S, 116 



rudis, F, 115 



scaber, F, 115 



stenophyllus. F, 116 

 STEPHANOMERIA, F, 118, 123 

 STERCULIACEAE, T&S, 67 

 Stevia . F, 120 

 Stickseed, F, 90 

 STILLINGIA, F, 65 

 Stinkgrass, G. 5 

 STIPA, G, 10 

 Stiporyzopsis, G, 10 

 St. John's Wort, F, 67 

 Stonecrop, F, 46 

 Stoneseed, F, 90 

 Storksbill, F, 63 

 Strawberry, F, 49 

 Streptanthella, F, 40, 45 

 STREPTANTHUS, F, 40, 45 

 STREPTOPUS, F, 18 

 Strobus, T&S, 3 

 Strombocarpa , T&S, 52 

 STYLOCLINE, F, 123 

 SUAEDA, F, 30 

 SUBULARIA, F, 45 

 Sudan Grass, G, 12 

 SUKSDORFIA, F, 48 

 Sumac, T&S. 65 

 Summercypress, F, 29 

 Sumpweed, F, 118 

 Sundew. F. 46 

 Sunflower, F, 116 

 Sunflower Family, T&S, 102 

 Svida. T&S. 77 

 SWAINSONIA, F, 63 

 Swainsonpea, F. 63 

 Swallow -wort, F, 81 

 Sweetanise, F, 76 

 Sweet - - 



clover, F. 62 



grass, G, 11 



pea. F, 59 



root, F. 76 



vetch. F, 59 

 SWERTIA, F, 79, 80 

 SYMPHORICARPOS, T&S, 101 

 Syntherisma. G, 11 

 SYNTHYRIS, F, 93. 99 

 Syringa. T&S. 47 

 SYNTRICHOPAPPUS, F, 123 

 Syrmatium, F. 59 



TAENIATHERUM, G, 8 

 TALINUM, F, 31, 32 

 Tamarisk. T&S. 67 

 TAMARIX, T&S, 67 

 TAMARICACEAE, T&S, 67 

 TANACETUM, F, 12.3 

 Tanglehead, G. 12 

 Tansy, F. 123 

 Tansymustard, F, 40 

 TARAXACUM, F, 123 

 Taraxia, F, 71 

 Tarragon. F. 103 

 Tar weed, F. 119 

 Teasel, F. 101 

 TELESONIX, F, 49 

 Tellima , F, 47 

 Tessaranthium, F. 79 

 TETRADYMIA, T&S, 123 

 Tetraneuris, F, 117 

 TEUCRIUM, F, 93 

 Thalesia , F, 99 

 Thaspium, F, 75 

 THALICTRUM, F, 38 

 THAMNOSMA, T&S, 64 

 THELESPERMA, F, 123 

 Thelypodiopsis, F, 45 

 THELYPODIUM, F. 40, 42, 

 44, 45 



I 59 



