INDEX 



431 



Rush, 73 



Spike, 63 

 Rye, Wild, 55 



Sage, 314 



Black, 316 



California, 400 



Thistle, 314 



White, 316 

 Sagina, 134 

 Sagittaria, 17 

 Salicaceae, 89 

 Salicornia, 119 

 Salix, 90 

 Salsify, 410 

 Salsola, 121 



Salt-bush, Australian, 119 

 Salvia, 314 

 Sambucus, 348 

 Samolus, 275 

 Sand Rocket, 153 

 Sand- verbena, 125 

 Sanicula, 256 

 Sarcodes, 271 

 Saururaceae, 88 

 Saxifraga, 170 

 Saxifragaceae, 169 

 Saxifrage, 170 

 Saxifrage Family, 169 

 Scheuzeriaceae, 14 

 Schmaltzia, 219 

 Schoenus, 65 

 Scirpus, 61 

 Screw- bean, 187 

 Scrophularia, 329 

 Scophulariaceae, 326 

 Scutellaria, 312 

 Sea Purslane, 127 

 Sedge, 66 

 Sedge Family, 58 

 Sedum, 165 

 Senecio, 401 

 Senecioneae, 400 

 Sericotheca, 177 

 Service Berry, 184 

 Sesuvium, 127 

 Setaria, 24 

 Shooting-star, 276 

 Sida, 230 

 Sidalcea, 228 

 Silene, 131 

 Silk-tassel Tree, 268 

 Silybum, 404 



Sisymbrium, 153, 155, 160 

 Sisyrinchium 85 

 Sitanion, 57 

 Slum, 262 

 Skullcap, 312 



Slippery-elm, Calfornia, 230 

 Snap-dragon, 328 

 Sneezeweed, 396 

 Sneezeweed Tribe, 390 

 Snowberrry, 348 

 Snow-plant, 271 

 Soap-plant, 77 

 Solanaceae, 320 

 Solanum, 322 

 Solidago, 363 

 Sonchus, 411 

 Sophia, 160 

 Sorghum, 21 

 Sorghum Tribe, 21 

 Sow-thistle, 411 

 Spanish Bayonet, 84 

 Sparganicaeae 9 

 Sparganium, 9 

 Spartina, 38 

 Spearmint, 320 

 Speedwell, 337 

 Spergula, 135 

 Sphaerostigma, 247 

 Sphenosciadium, 264 

 Spikenard, California, 252 

 Spiranthes, 87 

 Spirodela, 70 

 Sporobolus, 31 

 Spruce, Big-cone, 5 



False, 5 

 Spurge Family, 211 

 Stachys, 313 

 Stanleya, 150 

 Sterculia Famaily, 230 

 Sterculiaceae, 230 

 Stillingia, 213 

 Stipa, 28 



Stone-crop Family, 165 

 Streptanthus, 152 

 Strombocarpa, 187 

 Stylocline, 374 

 Stylophyllum, 167 

 Sumac Family, 218 

 Sunflower, 380 

 Sweet Alyssum, 162 

 Svida, 268 

 Sycamore, 176 

 Symphoricarpus, 348 



