476 



Index 



Rudimentary structures, 405 

 Runners, 381 

 Rusts, 273, 451 



Sachs, 32, 215 



Salt marshes, 271 



Salvia, fertilization, 312 



Sand Box, 384 



Sap-cavities, 150, 161; growth, 342 



Saprophytes, 17, 450, 465 



Sargassum, 447 



Scientific procedure, 31 



Scion, or cion, 349 



Scorpiurus, 399 



Sea-mosses, 447 



Secondary sexual characters, 288, 291 



Secretions, 106, 116, 220 



Sedentary habit, 49, 378 



Seedling, described, 359, 361 



Seed-plants, described, 459 



Seeds, 354; vitality, 355; from mummies, 

 355; protection of, 276; animal car- 

 riage, 394; dissemination, 378; pro- 

 jection, 383; wattage, 387; wings, 388; 

 flotation, 393; vs. fruit, 391 



Seed sports, 437 



Selection of variations, 429 



Self-planting, 400 



Semi-permeable membranes, 173 



Sense organs, 234 



Sensitive Plant, 237, 243, 244, 251 



Sensitivity, 145 



Sex, 278; meaning of, 286, 291; origin 

 of, 288; prominence of, 292 



Sexual reproduction, significance, 286; 

 superior to asexual, 293 



Sexual cells, 280, 288 



Shapes of leaves, 53 



Shoot and root explained, 49 



Sieve tubes, described, 155, 219, 221 



Skeleton of plants, 106, 107, 152, 257 



Sleep movements, 236, 238, 244, 266 



Sleeping rooms, plants in, 87 



Slime, or jelly, of plants, 273 



Slime molds, 141, 449 



Slowness of plant actions, 76 



Smilax, 67, 71 



Smuts, 273, 451 



Snails, in cross pollination, 324 



Society, plant, 465 



Soils, aeration, 85; structure, 86, 122; 



drainage, 87 

 Spanish Moss, 455 

 Special Creation, 403 

 Spectroscope, described, 33 

 Spermatozoids, 283, 290 

 Spermatophvtes, described, 459 

 Sphagnum, 455 

 Spines, 68; use, 275 

 Spirogyra, 304, 446 

 Spongiole, 169 



Spontaneity of variation, 432 

 Spontaneous generation, 148 

 Spores, colors, 263, asexual, 280, 281 ; in 



air, 391; 446, 453, 455, 457 

 Sports, preservation, 435 

 Spots, 451 

 Sprengel, 314 



Spring, coloraton, 39; vegetation in, 368 

 Spruce tree, 59 

 Squirting Cucumber, 384, 386 

 Stamens, sensitive, 323 

 Starch, in leaves, 23, tests, 23, chemistry, 

 27, 108, 110; iodine test, 109; as reserve 

 food, 109; food for man, 109; grains, 

 structure, 110, 112; digestion of, 110; 

 individuality of, 111; in potato. 111 

 Stems, characteristics, 61; with func- 

 tion of foliage, 70, 71; generalized, 

 214 ; two types, 364 ; cellular anatomy, 

 220, 221; construction, 222. 258 

 Sterilization methods, 103 

 Stigma, 281; sensitive, 323 

 Stimulus, 229; perception of, 229; dif- 

 ferential responses, 230, 231; action of, 

 242, 247, 248, 253, 255; in growth, 

 355, 358 

 Stipa pinnata, 400 

 Stipules, 53, 70 

 Stolons, 381 

 Stomata, 22; number, 207, size, 207; 



use of, 269, 273 

 Stomatal chambers, 271 

 Storage battery, 93, 96 

 Strains, adjustments to, 252 

 Strand plants, 465 



