Spawn, 229 
Special Adaptations, 319 
Species, 114, 158 
Spermatochnaceae, 337 ~ 
Spermogones, 215, 233 
Sperms, 110, 174 
Sphacelariaceae, 337 
Sphacelotheca, 347 
Sphaerobolaceae, 345 
Sphaerobolus, 345 
Sphaerococcaceae, 339 
Sphaeriaceae, 343 
Sphaerioidaceae, 347 
Sphaeronemella, 347 
Sphaerophoraceae, 341 
Sphaerophorus, 341 
Sphaeroplea, 334 
Sphaeropleaceae, 334 
Sphaeropsidales, 238, 347 
Sphaeropsis, 347 
Sphaerotheca, 225 
Sphagnaceae, 349 
Sphagnales, 251, 349 
Sphagnum, 250, 349 
Sphenophyllaceae, 353 
Sphenophyllales, 353 
Sphenophyllineae, 262, 353 
Sphenophyllum, 262 
Spiderworts, 358 
Spikelet, 297 
Spiraea, 307, 368 
Spiral vessels, 36 
Spiranthes, 361 
Spiridentaceae, 351 
Spirochaete, 331 
Spirodela, 358 
Spirogyra, 178, 333 
Spirogyraceae, 333 
Spirulina, 165 
Splachnaceae, 350 
Splachnidiaceae, 337 
Splachnum, 252, 350 
Spleenworts, 259 
Sponge tissue, 292 
Spontaneous Generation, 166 
Sporangium, 190 
Spore-case, 250 
-fruit, 109, 175, 213 
mother-cells, 243 
-prints, 231 
Sporids, 233 
INDEX 
Sporocarp, 175, 213 
Sporochnaceae, 337 
Sporodinia, 197 
Sporogenous tissues, 211 
Sporophyll, 261 
Sporophyte, 110, 242 
Spot Fungi, 238, 347 
Spruces, 281 
Squamariaceae, 338 
Squash, 305 
Stachyuraceae, 364 
Stackhousiaceae, 371 
Stalked Puff-balls, 231 
Stamens, 284 
Staminate, 275 
Stapelia, 322, 367 
Staphyleaceae, 371 
Starch, 13, 85, 147 
Star Flowers, 370 
Statocysts, 127 
Statoliths, 126 
Stearic acid, 143 
Stearin, 143 
Stem, 255 
Stemonaceae, 358 
Sterculiaceae, 362 
Stereocaulon, 340 
Stereum, 230, 346 
Sterigmata, 222 
Sterigmatocystis, 348 
Sterile tissues, 211 
Stickseed, 325 
Sticta, 340 
Stictaceae, 340 
Stictidaceae, 341 
Stictis, 341 
Stigma, 286, 292 
Stigmonose, 134 
Stigonema, 165, 331 
Stigonemataceae, 165, 331 
Stilbaceae, 348 
Stilophoraceae, 337 
Stink-horns, 228, 345 
Stinking Smut, 237 
Stipules, 292 
Stomata, 51 
Stone cells, 32 
Stoneworts, 193, 336 
Storage tissues, 66 
Store of food, 319 
405 
Strawberry, 289, 306, 319, 326 
