INDEX 



487 



Selaginellaceae, 331 



Senna family, 436 



Sensitive plant, 33, 34, 440 



Sepals, 367, 368 



Seta, 277, 292 



Sex, evolution of, 167, 174, 182, 186, 



188, 193, 195 

 Shade plants, 34-38 

 Shull, 133 

 Sieve tubes, 74, 75 

 Siphonales, 183 

 Skull-cap, 462 

 Skunk cabbage, 397 

 Sleep movements, 33 

 Slime mould, 142, 143, 145 

 Smuts, 239 

 Soapberry order, 441 

 Soils, nature of, 47, 49 

 Solanum, 466 

 Soldier's cap, 429 

 Solomon's seal, leaf 7, 385 

 Soredium, 252, 253 

 Sorus, 252, 253 

 Spadix, 395 

 Spathe, 395 

 Spathyema, 397 

 Spathyema, leaf structure, 39 

 Species, 139 

 Sperm, 185, 261 

 Spermatophyta, 337 

 Sphaerella, 164, 165 

 Sphaeriales, 225, 226 

 Sphagnales, 282 

 Sphagnum, 283, 285 

 Spirillum, 148 

 Spirog>-ra, 175, 176 

 Spleenwort, 313 

 Spongy mesophyll, 9, 11, 20 

 Sporangia, 143, 300, 301, 310 

 Spore, III 



differentiation of, 325 



germination of, 264, 286, 324, 333 

 Sporophylls, 109, 311, 322, 363 

 Sporophyte generation, 129, 182, 189, 



202, 237, 267 

 Sporophyte, development of, 278, 



295. 298, 304, 330, 344, 355 

 Squash, leaf, 10 

 Stamen, 109, 363, 384 

 Staminodia, 405, 406, 458 

 Starch, 2, 12, 16, 18, 19 



test for, 14 

 Staurastrum, 177 

 Steironcma, 459 



Stem, dicotyledon, 85, 86, 88 



function of, 66 



growth of 84, 85, 86, 91 



healing of, 95 



modification of, 99 



monocotyledons, 79, 90 



sensitiveness of, 98 



structure of, 66, 72, 79, 88 

 Stemonitis, 143 

 Stereome, 35, 73, 85 

 Stereum, 245 

 Sticta, 250 



Stigma, 109, 113, 373 

 Stimuli, effects of, 4 



reaction to, 5 

 Stink horns, 249 

 Stipe, 242 

 Stipules, 411 

 Stolon, 104 



Stoma, 8, 9, 10, 20, 24, 35, 36 

 Stone fruit, 383 

 Storage organs, 18, 63 

 Strawberry, 368, 435 

 Strobilus, 320, 322, 326, 358 

 Stroma, 227, 228 

 Style, no 

 Suber, 81 

 Sugar, 12, 16 

 Surface reductions, 43 

 Syspensor, 117, 118, 330, 345, 380 

 Symbiosis, 251 

 Sympetalae, 454 

 Symphytum, 369, 460 

 Synergid, 112, 113, 374, 381 



Tabellaria, 158 



Tapetum, 363 



Taraxacum, 471, 472 



Taxodium, 361 



Taxus, 360 



Telial stage, 237 



Teliospores, 236, 237 



Teliospore stage, 238 



Tendrils, loi, 102 



Tetraspores, 200 



Thallophyta, classification of, 142 



Thallus, 268, 269 



Thaxter, 146 



Thelephoraceae, 245 



Thistle family, 474 



Thuja, 360 



Tissue, strengthening, 78 



Toadflax, 464 



Toadstools, 240, 242 



